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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 storage_volume_templates(self):
 """ Gets the StorageVolumeTemplates API client. Returns: StorageVolumeTemplates: """

        if not self.__storage_volume_templates:
            self.__storage_volume_templates = StorageVolumeTemplates(self.__connection)
        return self.__storage_volume_templates