protected function tmb($args) {
		
		$result  = array('images' => array());
		$targets = $args['targets'];
		
		foreach ($targets as $target) {
			if (($volume = $this->volume($target)) != false
			&& (($tmb = $volume->tmb($target)) != false)) {
				$result['images'][$target] = $tmb;
			}
		}
		return $result;
	}