public function setMsg( $key, $message, $domain = null, $lang = null ) {
		$domain = IntuitionUtil::nonEmptyStr( $domain )
			? $this->normalizeDomain( $domain )
			: $this->getDomain();
		$lang = IntuitionUtil::nonEmptyStr( $lang )
			? $this->normalizeLang( $lang )
			: $this->getLang();

		$this->messageBlob[$domain][$lang][$key] = $message;
	}