Reverse engineer an operation resulting in 2 extra messages in the Messages node.

Repro steps:
- create a java project
- add a class with the following method and save the project
    public static void main(String[] args) {
        System.out.println("Hello World Java!");
    }
- reverse engineer the java project into a uml project
- reverse engineer operation the main method into the sequence diagram
- expand the nodes to the Messages node under the main method
see attached screenshot.