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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:
 """Marks a ``Callable`` as the producer of a named rate. This is a convenience wrapper around ``register_value_producer`` that makes sure rate data is appropriately scaled to the size of the simulation time step. It is equivalent to ``register_value_producer(value_name, source, preferred_combiner=replace_combiner, preferred_post_processor=rescale_post_processor)`` Parameters rate_name : The name of the new dynamic rate pipeline. source : A callable source for the dynamic rate pipeline. Returns ------- Callable A callable reference to the named dynamic rate pipeline. """

        return self._value_manager.register_rate_producer(rate_name, source)