Pimcore\Model\Object\Service::synchronizeCustomLayoutFieldWithMaster PHP Method

    private static function synchronizeCustomLayoutFieldWithMaster($masterDefinition, &$layout)
    {
        if ($layout instanceof ClassDefinition\Data) {
            $fieldname = $layout->name;
            if (!$masterDefinition[$fieldname]) {
                return false;
            } else {
                if ($layout->getFieldtype() != $masterDefinition[$fieldname]->getFieldType()) {
                    $layout->adoptMasterDefinition($masterDefinition[$fieldname]);
                } else {
                    $layout->synchronizeWithMasterDefinition($masterDefinition[$fieldname]);
                }
            }
        }
        if (method_exists($layout, "getChilds")) {
            $children = $layout->getChilds();
            if (is_array($children)) {
                $count = count($children);
                for ($i = $count - 1; $i >= 0; $i--) {
                    $child = $children[$i];
                    if (!self::synchronizeCustomLayoutFieldWithMaster($masterDefinition, $child)) {
                        unset($children[$i]);
                    }
                    $layout->setChilds($children);
                }
            }
        }
        return true;
    }