code: def remove_pane(self, pane):
          
          assert isinstance(pane, Pane)
  
          for w in self.windows:
              w.remove_pane(pane)
  
              # No panes left in this window?
              if not w.has_panes:
                  # Focus next.
                  for app, active_w in self._active_window_for_cli.items():
                      if w == active_w:
                          with set_app(app):
                              self.focus_next_window()
  
                  self.windows.remove(w)
docs: Remove a :class:`.Pane`. (Look in all windows.)