action perform action event action perform sourc radio button radio button sourc radio button sourc action command sourc action command object target uml radio button panel sourc parent target model facad model element target model facad element resid target model facad element target object kind action command equal command kind model visibl kind action command equal command kind model visibl kind action command equal command kind model visibl kind kind model visibl kind model core helper set visibl target kind 