creat link base given port port point messag coordin instanc port point messag coordin instanc object instanc sequenc diagram draw messag edg class link support tigri gef graph mutabl graph model connect object object object connect object port object port object edg type object action type object edg object action model meta type action equal action type action model common behavior factori creat action model common behavior helper set asynchron action model meta type creat action equal action type action model common behavior factori creat creat action model common behavior helper set asynchron action model meta type action equal action type action model common behavior factori creat action model common behavior helper set asynchron action model meta type destroi action equal action type action model common behavior factori creat destroi action model common behavior helper set asynchron action model meta type send action equal action type action model common behavior factori creat send action model common behavior helper set asynchron action model meta type termin action equal action type implement port port action object associ role model collabor helper associ role port port associ role associ role model collabor factori build associ role port port object messag model collabor factori build messag interact associ role action model collabor helper set action messag action defin collaborationdiagram lp collaborationdiagram granular type statement lp collaborationdiagram local nest ifdef sequencediagram model core helper set namespac action collabor endif model collabor helper set sender messag port model common behavior helper set receiv messag port add edg messag edg messag defin log lp log granular type statement lp log local nest ifdef sequencediagram edg log debug incorrect edg endif edg 