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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 register_value_modifier(self, value_name: str, modifier: Callable, priority: int=5):
 """Marks a ``Callable`` as the modifier of a named value. Parameters value_name : The name of the dynamic value pipeline to be modified. modifier : A function that modifies the source of the dynamic value pipeline when called. If the pipeline has a ``replace_combiner``, the modifier should accept the same arguments as the pipeline source with an additional last positional argument for the results of the previous stage in the pipeline. For the ``list_combiner`` and ``set_combiner`` strategies, the pipeline modifiers should have the same signature as the pipeline source. priority : {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} An indication of the order in which pipeline modifiers should be called. Modifiers with smaller priority values will be called earlier in the pipeline. Modifiers with the same priority have no guaranteed ordering, and so should be commutative. """

        self._value_manager.register_value_modifier(value_name, modifier, priority)