overrid updat layout uml chang event event updat layout event event attribut chang event object sourc event sourc model facad attribut sourc todo just need rerend singl line text repres element sure tfm todo bob repli shouldn interest event fig featur notat listen chang fig featur updat updat attribut event associ chang event owner equal event sourc object event add associ event event valu event remov associ event event old valu model facad attribut todo bob sai listen addit remov attribut fig attribut compart updat attribut 