public void doValidation() {
if (!model.isColaboration()) return;
List<EdgeAdaptor> messages = getMessageFlowList();
List<EdgeAdaptor> conversationLinks = messageEvent.getAdjacentEdges(ConversationLink.class);
if (messages.isEmpty() && conversationLinks.isEmpty()) {
reportNoMessages(); // @todo: Validation needs to be refined for main process events!
} else if (messages.size() + conversationLinks.size() > 1) {
reportTooManyMessages(messages);
}
}
