parent = parent.getParentItem();
AddTypeToPriorityListDialog dialog = new AddTypeToPriorityListDialog(this,
editor.definedTypesWithSupers.get(), // types
getTypePriorityListFromTreeItem(parent).getTypes()); // types already in list
if (dialog.open() == Window.CANCEL)
return;
TypePriorityList typePriorityList = getTypePriorityListFromTreeItem(parent);
String[] newTypeNames = dialog.getSelectedTypeNames();