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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 get_range_by_partition_key_range_id(self, partition_key_range_id):
 """Gets the partition key range given the partition key range id :param str partition_key_range_id: The partition key range id. :return: The partition key range. :rtype: dict """

        t = self._rangeById.get(partition_key_range_id)

        if t is None:
            return None
        return t[0]