/**
* returns the worst message that is available.
*
* @param messages all current feedback messages
* @return worst possible message or null
*/
private FeedbackMessage getWorstMessage(final FeedbackMessages messages) {
for (final Integer messageType : messageTypes) {
final FeedbackMessage ret = messages.first(messageType);
if (ret != null) {
return ret;
}
}
return messages.first();
}
