markup = border.getMarkup(null);
compareMarkupWithString(markup, "<wicket:border> 111 <wicket:body/> 222</wicket:border>");
assertNull(border.getBodyContainer().getAssociatedMarkup());
border.dequeue();
markup = border.getBodyContainer().getMarkup();
compareMarkupWithString(markup, "<wicket:body/>");
markup = border.getBodyContainer().getMarkup(null);
compareMarkupWithString(markup, "<span wicket:id=\"border\">test</span>");