code: def get_timeout(self, callback=None):
          
          def got_timeout(a):
              if callable(callback):
                  callback(int(a['VisibilityTimeout']))
          self.get_attributes('VisibilityTimeout', callback=got_timeout)
docs: Get the visibility timeout for the queue.
          
          :rtype: int
          :return: The number of seconds as an integer.