src/CoreBundle/Contao/Hooks/LoadDataContainer.php
private function buildMap()
    {
        $map = [];
        foreach ($this->combination->getParented() as $childName => $child) {
            $map[$child['meta']['ptable']][$childName] = $child;
        }

        return $map;
    }
private function buildMap()
    {
        $map = [];
        foreach ($this->combination->getParented() as $childName => $child) {
            $map[$child['meta']['ptable']][$childName] = $child;
        }

        return $map;
    }
Build the data container map.

@return array