code: def _justDisplay(self, tool):
          
          self.header.title.set_text(tool.name)
  
          body, _options = self.widget.contents["body"]
          overlay = urwid.Overlay(tool.widget, body, *tool.position)
          self._surface = urwid.AttrMap(overlay, "foreground")
          self.widget.contents["body"] = self._surface, None
docs: Displays the given tool. Does not register it in the tools list.