parameters: ()
docstring: Clears the visualization world.
docstring_summary: Clears the visualization world.
docstring_tokens: Clears the visualization world .
function: def clear() -> None:
      """Clears the visualization world."""
      if _backend is None:
          return
      scene().clear()
function_tokens: def clear ( ) -> None : if _backend is None : return scene ( ) . clear ( )