code: def _(pymux, variables):
      " Go to previous active window. "
      w = pymux.arrangement.get_previous_active_window()
  
      if w:
          pymux.arrangement.set_active_window(wf _(pymux, variables):
      " Go to previous active window. "
      w = pymux.arrangement.get_previous_active_window()
  
      if w:
          pymux.arrangement.set_active_window(w)
docs: Go to previous active window.