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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 id_pools_ipv4_ranges(self):
 """ Gets the IdPoolsIpv4Ranges API client. Returns: IdPoolsIpv4Ranges: """

        if not self.__id_pools_ipv4_ranges:
            self.__id_pools_ipv4_ranges = IdPoolsIpv4Ranges(self.__connection)
        return self.__id_pools_ipv4_ranges