def get_learning_batch_proxy_manager(self):
if proxy is None:<EOL><INDENT>raise NullArgument()<EOL><DEDENT>raise Unimplemented()<EOL>
Gets a ``LearningBatchProxyManager``.

        return: (osid.learning.batch.LearningBatchProxyManager) - a
                ``LearningBatchProxyManager``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_learning_batch() is false``
        *compliance: optional -- This method must be implemented if
        ``supports_learning_batch()`` is true.*