determin given edg validli place graph edg graph unlik node appear valid type edg binari associ gener extend includ depend end node graph ok place edg graph param edg edg consid code code given object valid edg graph code code overrid add edg object edg edg contain edg edg end valid edg object sourc model element object dest model element model facad associ edg allow binari associ collect conn model facad connect edg iter iter conn iter conn size object associ end iter object associ end iter assoc end don type defin associ end associ end sourc model element model facad type associ end dest model element model facad type associ end model facad gener edg sourc model element model facad specif edg dest model element model facad gener edg model facad extend edg sourc model element model facad base edg dest model element model facad extens edg model facad includ edg sourc model element model facad base edg dest model element model facad addit edg model facad depend edg depend potenti client supplier consid clear realli accept collect client model facad client edg collect supplier model facad supplier edg client client supplier supplier sourc model element client iter dest model element supplier iter edg comment edg sourc model element comment edg edg sourc dest model element comment edg edg destin end defin node graph sourc model element dest model element defin log lp log granular type statement lp log local nest statement lp log local lp log local nest ifdef usecasediagram log error edg reject end attach endif contain node sourc model element contain edg sourc model element defin log lp log granular type statement lp log local nest statement lp log local lp log local nest ifdef usecasediagram log error edg reject sourc end attach sourc model element graph model endif contain node dest model element contain edg dest model element defin log lp log granular type statement lp log local nest statement lp log local lp log local nest ifdef usecasediagram log error edg reject destin end attach dest model element graph model endif 