Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Chart/GridLines.php
public function setShadowProperties($sh_presets, $sh_color_value = null, $sh_color_type = null, $sh_color_alpha = null, $sh_blur = null, $sh_angle = null, $sh_distance = null)
    {
        $this->activateObject()
            ->setShadowPresetsProperties((int) $sh_presets)
            ->setShadowColor(
                $sh_color_value === null ? $this->shadowProperties['color']['value'] : $sh_color_value,
                $sh_color_alpha === null ? (int) $this->shadowProperties['color']['alpha'] : $this->getTrueAlpha($sh_color_alpha),
                $sh_color_type === null ? $this->shadowProperties['color']['type'] : $sh_color_type
            )
            ->setShadowBlur($sh_blur)
            ->setShadowAngle($sh_angle)
            ->setShadowDistance($sh_distance);
    }
public function setShadowProperties($sh_presets, $sh_color_value = null, $sh_color_type = null, $sh_color_alpha = null, $sh_blur = null, $sh_angle = null, $sh_distance = null)
    {
        $this->activateObject()
            ->setShadowPresetsProperties((int) $sh_presets)
            ->setShadowColor(
                $sh_color_value === null ? $this->shadowProperties['color']['value'] : $sh_color_value,
                $sh_color_alpha === null ? (int) $this->shadowProperties['color']['alpha'] : $this->getTrueAlpha($sh_color_alpha),
                $sh_color_type === null ? $this->shadowProperties['color']['type'] : $sh_color_type
            )
            ->setShadowBlur($sh_blur)
            ->setShadowAngle($sh_angle)
            ->setShadowDistance($sh_distance);
    }
Set Shadow Properties.

@param int $sh_presets
@param string $sh_color_value
@param string $sh_color_type
@param int $sh_color_alpha
@param string $sh_blur
@param int $sh_angle
@param float $sh_distance