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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 list_metering_label_rules(self, retrieve_all=True, **_params):
 """Fetches a list of all metering label rules for a label."""

        return self.list('metering_label_rules',
                         self.metering_label_rules_path, retrieve_all,
                         **_params)