public function Contains ($path = '', $async = FALSE, $defer = FALSE, $doNotMinify = FALSE) {
		$result = FALSE;
		$scriptsGroup = & $this->_getScriptsGroupContainer($this->actualGroupName);
		foreach ($scriptsGroup as & $item) {
			if ($item->path == $path) {
				if ($item->async == $async && $item->defer == $defer && $item->doNotMinify == $doNotMinify) {
					$result = TRUE;
					break;
				}
			}
		}
		return $result;
	}