code: def call_async(self, func: Callable, *args, **kwargs):
          
          return asyncio_extras.call_async(self.loop, func, *args, **kwargs)
docs: Call the given callable in the event loop thread.
  
          This method lets you call asynchronous code from a worker thread.
          Do not use it from within the event loop thread.
  
          If the callable returns an awaitable, it is resolved before returning to the caller.
  
          :param func: a regular function or a coroutine function
          :param args: positional arguments to call the callable with
          :param kwargs: keyword arguments to call the callable with
          :return: the return value of the call