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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 appliance_device_read_community(self):
 """ Gets the ApplianceDeviceReadCommunity API client. Returns: ApplianceDeviceReadCommunity: """

        if not self.__appliance_device_read_community:
            self.__appliance_device_read_community = ApplianceDeviceReadCommunity(self.__connection)
        return self.__appliance_device_read_community