@classmethod
def discover(cls, cli, remote_system):
    """
        Discover migrationObject instances on the remoteSystem.

        :param remote_system: Remote system from which objects need to
            be migrated.
        :return:
        """
    req_body = cli.make_body(remoteSystem=remote_system)
    resp = cli.type_action(cls().resource_class, 'discover', **req_body)
    resp.raise_if_err()
    return resp
