Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/Theme.php
public function writeTheme(Spreadsheet $spreadsheet)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // a:theme
        $objWriter->startElement('a:theme');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
        $objWriter->writeAttribute('name', 'Office Theme');

        // a:themeElements
        $objWriter->startElement('a:themeElements');

        // a:clrScheme
        $objWriter->startElement('a:clrScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:dk1
        $objWriter->startElement('a:dk1');

        // a:sysClr
        $objWriter->startElement('a:sysClr');
        $objWriter->writeAttribute('val', 'windowText');
        $objWriter->writeAttribute('lastClr', '000000');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:lt1
        $objWriter->startElement('a:lt1');

        // a:sysClr
        $objWriter->startElement('a:sysClr');
        $objWriter->writeAttribute('val', 'window');
        $objWriter->writeAttribute('lastClr', 'FFFFFF');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:dk2
        $this->writeColourScheme($objWriter);

        $objWriter->endElement();

        // a:fontScheme
        $objWriter->startElement('a:fontScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:majorFont
        $objWriter->startElement('a:majorFont');
        $this->writeFonts($objWriter, 'Cambria', self::$majorFonts);
        $objWriter->endElement();

        // a:minorFont
        $objWriter->startElement('a:minorFont');
        $this->writeFonts($objWriter, 'Calibri', self::$minorFonts);
        $objWriter->endElement();

        $objWriter->endElement();

        // a:fmtScheme
        $objWriter->startElement('a:fmtScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:fillStyleLst
        $objWriter->startElement('a:fillStyleLst');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '50000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '35000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '37000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '15000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lin
        $objWriter->startElement('a:lin');
        $objWriter->writeAttribute('ang', '16200000');
        $objWriter->writeAttribute('scaled', '1');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '51000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '130000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '80000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '93000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '130000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '94000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '135000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lin
        $objWriter->startElement('a:lin');
        $objWriter->writeAttribute('ang', '16200000');
        $objWriter->writeAttribute('scaled', '0');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lnStyleLst
        $objWriter->startElement('a:lnStyleLst');

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '9525');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '95000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '105000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '25400');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '38100');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyleLst
        $objWriter->startElement('a:effectStyleLst');

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '20000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '38000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '23000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '35000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '23000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '35000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:scene3d
        $objWriter->startElement('a:scene3d');

        // a:camera
        $objWriter->startElement('a:camera');
        $objWriter->writeAttribute('prst', 'orthographicFront');

        // a:rot
        $objWriter->startElement('a:rot');
        $objWriter->writeAttribute('lat', '0');
        $objWriter->writeAttribute('lon', '0');
        $objWriter->writeAttribute('rev', '0');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:lightRig
        $objWriter->startElement('a:lightRig');
        $objWriter->writeAttribute('rig', 'threePt');
        $objWriter->writeAttribute('dir', 't');

        // a:rot
        $objWriter->startElement('a:rot');
        $objWriter->writeAttribute('lat', '0');
        $objWriter->writeAttribute('lon', '0');
        $objWriter->writeAttribute('rev', '1200000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:sp3d
        $objWriter->startElement('a:sp3d');

        // a:bevelT
        $objWriter->startElement('a:bevelT');
        $objWriter->writeAttribute('w', '63500');
        $objWriter->writeAttribute('h', '25400');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:bgFillStyleLst
        $objWriter->startElement('a:bgFillStyleLst');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '40000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '40000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '45000');
        $objWriter->endElement();

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '99000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '20000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '255000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:path
        $objWriter->startElement('a:path');
        $objWriter->writeAttribute('path', 'circle');

        // a:fillToRect
        $objWriter->startElement('a:fillToRect');
        $objWriter->writeAttribute('l', '50000');
        $objWriter->writeAttribute('t', '-80000');
        $objWriter->writeAttribute('r', '50000');
        $objWriter->writeAttribute('b', '180000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '80000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '30000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '200000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:path
        $objWriter->startElement('a:path');
        $objWriter->writeAttribute('path', 'circle');

        // a:fillToRect
        $objWriter->startElement('a:fillToRect');
        $objWriter->writeAttribute('l', '50000');
        $objWriter->writeAttribute('t', '50000');
        $objWriter->writeAttribute('r', '50000');
        $objWriter->writeAttribute('b', '50000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:objectDefaults
        $objWriter->writeElement('a:objectDefaults', null);

        // a:extraClrSchemeLst
        $objWriter->writeElement('a:extraClrSchemeLst', null);

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }
public function writeTheme(Spreadsheet $spreadsheet)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // a:theme
        $objWriter->startElement('a:theme');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
        $objWriter->writeAttribute('name', 'Office Theme');

        // a:themeElements
        $objWriter->startElement('a:themeElements');

        // a:clrScheme
        $objWriter->startElement('a:clrScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:dk1
        $objWriter->startElement('a:dk1');

        // a:sysClr
        $objWriter->startElement('a:sysClr');
        $objWriter->writeAttribute('val', 'windowText');
        $objWriter->writeAttribute('lastClr', '000000');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:lt1
        $objWriter->startElement('a:lt1');

        // a:sysClr
        $objWriter->startElement('a:sysClr');
        $objWriter->writeAttribute('val', 'window');
        $objWriter->writeAttribute('lastClr', 'FFFFFF');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:dk2
        $this->writeColourScheme($objWriter);

        $objWriter->endElement();

        // a:fontScheme
        $objWriter->startElement('a:fontScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:majorFont
        $objWriter->startElement('a:majorFont');
        $this->writeFonts($objWriter, 'Cambria', self::$majorFonts);
        $objWriter->endElement();

        // a:minorFont
        $objWriter->startElement('a:minorFont');
        $this->writeFonts($objWriter, 'Calibri', self::$minorFonts);
        $objWriter->endElement();

        $objWriter->endElement();

        // a:fmtScheme
        $objWriter->startElement('a:fmtScheme');
        $objWriter->writeAttribute('name', 'Office');

        // a:fillStyleLst
        $objWriter->startElement('a:fillStyleLst');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '50000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '35000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '37000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '15000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lin
        $objWriter->startElement('a:lin');
        $objWriter->writeAttribute('ang', '16200000');
        $objWriter->writeAttribute('scaled', '1');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '51000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '130000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '80000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '93000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '130000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '94000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '135000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lin
        $objWriter->startElement('a:lin');
        $objWriter->writeAttribute('ang', '16200000');
        $objWriter->writeAttribute('scaled', '0');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:lnStyleLst
        $objWriter->startElement('a:lnStyleLst');

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '9525');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '95000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '105000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '25400');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:ln
        $objWriter->startElement('a:ln');
        $objWriter->writeAttribute('w', '38100');
        $objWriter->writeAttribute('cap', 'flat');
        $objWriter->writeAttribute('cmpd', 'sng');
        $objWriter->writeAttribute('algn', 'ctr');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:prstDash
        $objWriter->startElement('a:prstDash');
        $objWriter->writeAttribute('val', 'solid');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyleLst
        $objWriter->startElement('a:effectStyleLst');

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '20000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '38000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '23000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '35000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:effectStyle
        $objWriter->startElement('a:effectStyle');

        // a:effectLst
        $objWriter->startElement('a:effectLst');

        // a:outerShdw
        $objWriter->startElement('a:outerShdw');
        $objWriter->writeAttribute('blurRad', '40000');
        $objWriter->writeAttribute('dist', '23000');
        $objWriter->writeAttribute('dir', '5400000');
        $objWriter->writeAttribute('rotWithShape', '0');

        // a:srgbClr
        $objWriter->startElement('a:srgbClr');
        $objWriter->writeAttribute('val', '000000');

        // a:alpha
        $objWriter->startElement('a:alpha');
        $objWriter->writeAttribute('val', '35000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:scene3d
        $objWriter->startElement('a:scene3d');

        // a:camera
        $objWriter->startElement('a:camera');
        $objWriter->writeAttribute('prst', 'orthographicFront');

        // a:rot
        $objWriter->startElement('a:rot');
        $objWriter->writeAttribute('lat', '0');
        $objWriter->writeAttribute('lon', '0');
        $objWriter->writeAttribute('rev', '0');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:lightRig
        $objWriter->startElement('a:lightRig');
        $objWriter->writeAttribute('rig', 'threePt');
        $objWriter->writeAttribute('dir', 't');

        // a:rot
        $objWriter->startElement('a:rot');
        $objWriter->writeAttribute('lat', '0');
        $objWriter->writeAttribute('lon', '0');
        $objWriter->writeAttribute('rev', '1200000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:sp3d
        $objWriter->startElement('a:sp3d');

        // a:bevelT
        $objWriter->startElement('a:bevelT');
        $objWriter->writeAttribute('w', '63500');
        $objWriter->writeAttribute('h', '25400');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:bgFillStyleLst
        $objWriter->startElement('a:bgFillStyleLst');

        // a:solidFill
        $objWriter->startElement('a:solidFill');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');
        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '40000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '40000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '45000');
        $objWriter->endElement();

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '99000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '350000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '20000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '255000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:path
        $objWriter->startElement('a:path');
        $objWriter->writeAttribute('path', 'circle');

        // a:fillToRect
        $objWriter->startElement('a:fillToRect');
        $objWriter->writeAttribute('l', '50000');
        $objWriter->writeAttribute('t', '-80000');
        $objWriter->writeAttribute('r', '50000');
        $objWriter->writeAttribute('b', '180000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gradFill
        $objWriter->startElement('a:gradFill');
        $objWriter->writeAttribute('rotWithShape', '1');

        // a:gsLst
        $objWriter->startElement('a:gsLst');

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '0');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:tint
        $objWriter->startElement('a:tint');
        $objWriter->writeAttribute('val', '80000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '300000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:gs
        $objWriter->startElement('a:gs');
        $objWriter->writeAttribute('pos', '100000');

        // a:schemeClr
        $objWriter->startElement('a:schemeClr');
        $objWriter->writeAttribute('val', 'phClr');

        // a:shade
        $objWriter->startElement('a:shade');
        $objWriter->writeAttribute('val', '30000');
        $objWriter->endElement();

        // a:satMod
        $objWriter->startElement('a:satMod');
        $objWriter->writeAttribute('val', '200000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:path
        $objWriter->startElement('a:path');
        $objWriter->writeAttribute('path', 'circle');

        // a:fillToRect
        $objWriter->startElement('a:fillToRect');
        $objWriter->writeAttribute('l', '50000');
        $objWriter->writeAttribute('t', '50000');
        $objWriter->writeAttribute('r', '50000');
        $objWriter->writeAttribute('b', '50000');
        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        $objWriter->endElement();

        // a:objectDefaults
        $objWriter->writeElement('a:objectDefaults', null);

        // a:extraClrSchemeLst
        $objWriter->writeElement('a:extraClrSchemeLst', null);

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }
Write theme to XML format.

@param Spreadsheet $spreadsheet

@throws \PhpOffice\PhpSpreadsheet\Writer\Exception

@return string XML Output