Gets an asset query session.

        arg     proxy (osid.proxy.Proxy): a proxy
        return: (osid.repository.AssetQuerySession) - an
                AssetQuerySession
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - supports_asset_query() is false
        compliance: optional - This method must be implemented if
                    supports_asset_query() is true.

def get_asset_query_session(self, proxy):
        """Gets an asset query session.

        arg     proxy (osid.proxy.Proxy): a proxy
        return: (osid.repository.AssetQuerySession) - an
                AssetQuerySession
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - supports_asset_query() is false
        compliance: optional - This method must be implemented if
                    supports_asset_query() is true.

        """
        if not self.supports_asset_query():
            raise Unimplemented()
        try:
            from . import sessions
        except ImportError:
            raise  # OperationFailed()
        proxy = self._convert_proxy(proxy)
        try:
            session = sessions.AssetQuerySession(proxy=proxy, runtime=self._runtime)
        except AttributeError:
            raise  # OperationFailed()
        return session