EntityBuilder<Person> builder = unitOfWork.newEntityBuilder( Person.class );
builder.instance().name().set( "Rickard" );
Person rickard = builder.newInstance();
builder = unitOfWork.newEntityBuilder( Person.class );
builder.instance().name().set( "Niclas" );
builder.instance().friend().set( rickard );
Person niclas = builder.newInstance();
niclas.members().add( rickard );