/**
	 * @param array $configs
	 *
	 * @return array
	 */	
	protected function merge(array $configs): array {
		$result = [];
		foreach ($configs as $config) {
			$result += $config;

			foreach ($config as $name => $dto) {
				$result[$name] += $dto;
			}
		}

		return $result;
	}