def get_message_event_definition(self, messageEventDefinition):
messageRef = first(self.xpath('<STR_LIT>'))<EOL>message = messageRef.get(<EOL>'<STR_LIT:name>') if messageRef is not None else self.node.get('<STR_LIT:name>')<EOL>return MessageEventDefinition(message)<EOL>
Parse the messageEventDefinition node and return an instance of
MessageEventDefinition