public static function install(Compiler $parser) {
		$me = new static($parser);
		$callback = array($me, 'macroGettext');
		$me->addMacro('_', $callback);
		$me->addMacro('_n', $callback);
		$me->addMacro('_p', $callback);
		$me->addMacro('_np', $callback);
	}