public function getData($name=NULL) {
		if(!isset($this->payload['params']['data'])) {
			return NULL;
		}
		$data = $this->payload['params']['data'];
		if(isset($name)) {
			if(isset($data[$name])) {
				return $data[$name];
			}
		} else {
			return $data;
		}
		return NULL;
	}