private static function prepare( $type, $message )
	{
		// to avoid typos and other mistakes we 
		// validate the alert type
		$type = strtolower( $type );
		if ( !in_array( $type, static::$_types ) ) 
		{
			throw new Exception( "UI\Alert - Unknown alert type '{$type}'!" );
		}

		// We always need to return an array
		if ( !is_array( $message ) )
		{
			return array( $message );
		}
		return $message;
	}