parameters: (event: E)
docstring: Focus the previous visible Window.
      (Often bound to the `BackTab` key.)
docstring_summary: Focus the previous visible Window.
      (Often bound to the `BackTab` key.)
docstring_tokens: Focus the previous visible Window . ( Often bound to the BackTab key . )
function: def focus_previous(event: E) -> None:
      """
      Focus the previous visible Window.
      (Often bound to the `BackTab` key.)
      """
      event.app.layout.focus_previous()
function_tokens: def focus_previous ( event : E ) -> None : event . app . layout . focus_previous ( )