public void addClub(Club club)
        {
            if (this.club == null)
                this.club = new ArrayList<Club>();
            this.club.add(club);
        }
Test ser/deser of graph objects (references and cyclic dependencies) with runtime schemas.

@author David Yu
@created Jan 19, 2011
protostuff-runtime/src/test/java/io/protostuff/runtime/RuntimeGraphTest.java