Contao\CoreBundle\DataContainer\PaletteManipulator::findLegendForField PHP Метод

    private function findLegendForField(array &$config, $field)
    {
        foreach ($config as $legend => $group) {
            if (in_array($field, $group['fields'], true)) {
                return $legend;
            }
        }
        return false;
    }