object sourc object relationship link doe exist uml link repres just associ todo treat messag todo implement uml tfm relationship flow flow flow flow relationship collect col flow sourc col col arrai relationship relationship relationship properti illeg argument except relationship instanc relationship properti non nl relationship associ list properti conn associ relationship member end conn size conn type relationship direct relationship list element sourc direct relationship relationship sourc sourc sourc relationship properti properti relationship associ 