Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/Escher/DgContainer/SpgrContainer/SpContainer.php
public function getNestingLevel()
    {
        $nestingLevel = 0;

        $parent = $this->getParent();
        while ($parent instanceof SpgrContainer) {
            ++$nestingLevel;
            $parent = $parent->getParent();
        }

        return $nestingLevel;
    }
public function getNestingLevel()
    {
        $nestingLevel = 0;

        $parent = $this->getParent();
        while ($parent instanceof SpgrContainer) {
            ++$nestingLevel;
            $parent = $parent->getParent();
        }

        return $nestingLevel;
    }
Get the nesting level of this spContainer. This is the number of spgrContainers between this spContainer and
the dgContainer. A value of 1 = immediately within first spgrContainer
Higher nesting level occurs if and only if spContainer is part of a shape group.

@return int Nesting level