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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def call(self, request_function, set_header_callback, *args, **kwargs):
 """Rate limit the call to request_function. :param request_function: A function call that returns an HTTP response object. :param set_header_callback: A callback function used to set the request headers. This callback is called after any necessary sleep time occurs. :param *args: The positional arguments to ``request_function``. :param **kwargs: The keyword arguments to ``request_function``. """

        self.delay()
        kwargs["headers"] = set_header_callback()
        response = request_function(*args, **kwargs)
        self.update(response.headers)
        return response