Gets an asset administration session for creating, updating and
        deleting assets.

        return: (osid.repository.AssetAdminSession) - an
                AssetAdminSession
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - supports_asset_admin() is false
        compliance: optional - This method must be implemented if
                    supports_asset_admin() is true.

def get_asset_admin_session(self, *args, **kwargs):
        """Gets an asset administration session for creating, updating and
        deleting assets.

        return: (osid.repository.AssetAdminSession) - an
                AssetAdminSession
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - supports_asset_admin() is false
        compliance: optional - This method must be implemented if
                    supports_asset_admin() is true.

        """
        if not self.supports_asset_admin():
            raise Unimplemented()
        try:
            from . import sessions
        except ImportError:
            raise  # OperationFailed()
        try:
            session = sessions.AssetAdminSession(proxy=self._proxy,
                                                 runtime=self._runtime, **kwargs)
        except AttributeError:
            raise  # OperationFailed()
        return session