code: def _select_other_window(history):
      " Toggle focus between left/right window. "
      current_buffer = history.app.current_buffer
      layout = history.history_layout.layout
  
      if current_buffer == history.history_buffer:
          layout.current_control = history.history_layout.default_buffer_control
  
      elif current_buffer == history.default_buffer:
          layout.current_control = history.history_layout.history_buffer_controf _select_other_window(history):
      " Toggle focus between left/right window. "
      current_buffer = history.app.current_buffer
      layout = history.history_layout.layout
  
      if current_buffer == history.history_buffer:
          layout.current_control = history.history_layout.default_buffer_control
  
      elif current_buffer == history.default_buffer:
          layout.current_control = history.history_layout.history_buffer_control
docs: Toggle focus between left/right window.