@abc.abstractmethod<EOL><INDENT>def get_installation_batch_proxy_manager(self):<DEDENT>
return<EOL>
Gets an ``InstallationBatchProxyManager``.

        :return: an ``InstallationBatchProxyManager``
        :rtype: ``osid.installation.batch.InstallationBatchProxyManager``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_installation_batch() is false``

        *compliance: optional -- This method must be implemented if
        ``supports_installation_batch()`` is true.*