Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Worksheet/AutoFilter.php
public function getColumn($pColumn)
    {
        $this->testColumnInRange($pColumn);

        if (!isset($this->columns[$pColumn])) {
            $this->columns[$pColumn] = new AutoFilter\Column($pColumn, $this);
        }

        return $this->columns[$pColumn];
    }
public function getColumn($pColumn)
    {
        $this->testColumnInRange($pColumn);

        if (!isset($this->columns[$pColumn])) {
            $this->columns[$pColumn] = new AutoFilter\Column($pColumn, $this);
        }

        return $this->columns[$pColumn];
    }
Get a specified AutoFilter Column.

@param string $pColumn Column name (e.g. A)

@throws PhpSpreadsheetException

@return AutoFilter\Column