properti chang properti chang event pve pve uml chang event uml chang event event uml chang event pve runnabl work runnabl runnabl run model chang event invalid element except defin log lp log granular type statement log debug enabl log debug event event log debug sourc event sourc log debug old event old valu log debug event properti log debug updat layout method access delet element endif swing util invok later work runnabl 