def METHOD_NAME(self):
    """Return the concatenated output names"""
    try:
        import tensorflow.compat.v1 as tf
    except ImportError:
        raise ImportError(
            "InputConfiguration: Unable to import tensorflow which is "
            "required to restore from saved model."
        )
    tags = self._get_tag_set()
    output_names = set()
    with tf.Session() as sess:
        meta_graph_def = tf.saved_model.loader.load(sess, tags, self._model_dir)
        for sig_def in meta_graph_def.signature_def.values():
            for output_tensor in sig_def.outputs.values():
                output_names.add(output_tensor.name.replace(":0", ""))
    tf.reset_default_graph()
    return ",".join(output_names)