drop drop target drop event drop target drop event transfer tr drop target drop event transfer flavor support reject drop tr data flavor support transfer model element uml collect flavor drop target drop event reject drop drop target drop event accept drop drop target drop event drop action model element transfer collect model element argo diagram diagram diagram util activ diagram model element collect tr transfer data transfer model element uml collect flavor iter model element iter fig node fig node uml diagram diagram drop drop target drop event locat fig node mutabl graph model gm mutabl graph model diagram graph model gm node contain fig node owner gm node add fig node owner global cur editor layer manag activ layer add fig node gm add node relat edg fig node owner drop target drop event drop target context drop complet unsupport flavor except defin log lp log granular type statement log debug except caught endif io except defin log lp log granular type statement log debug except caught endif 