core-bundle/src/Resources/contao/library/Contao/Message.php
public static function hasMessages($strScope=TL_MODE)
	{
		return static::hasError($strScope) || static::hasConfirmation($strScope) || static::hasNew($strScope) || static::hasInfo($strScope) || static::hasRaw($strScope);
	}
public static function hasMessages($strScope=TL_MODE)
	{
		return static::hasError($strScope) || static::hasConfirmation($strScope) || static::hasNew($strScope) || static::hasInfo($strScope) || static::hasRaw($strScope);
	}
Check if there are any messages

@param string $strScope An optional message scope

@return boolean True if there are messages