docs: def enqueue_convert(self, converter, from_resource, to_resource):
          '''
          Enqueue use of the given converter to convert to given
          resources.
  
          Deprecated: Use async version instead
          '''
          worker = self.pick_sticky(from_resource.url_string)
          args = (converter, from_resource, to_resource)
          coro = worker.enqueue(enums.Task.CONVERT, args)
          asyncio.ensure_future(coro)