method gui element ad proppanel subclass overrid place element wai want place element add field label text field add field label namespac namespac selector add visibl panel add modifi panel add separ add field label gener gener scroll add field label special special scroll add separ add field label own element own element scroll list list uml mutabl link list uml classifi import list model action add action remov add field label import element scroll pane list add action action navig namespac add action action add add action action add data type add action action add enumer add action action dialog element add action action stereotyp add action action tag definit add action delet action 