refresh();
WidgetInfo button = getObjectByName("button");
// do create
Position position = getPosition(container, "topbutton");
WidgetInfo newButton = createButton();
position.command_CREATE(newButton, button);
assertXML(
"// filler filler filler filler filler",
"<ui:UiBinder>",
" <t:MyContainer>",
" <t:topbutton>",