code: public org.tensorflow.util.SaverDef.CheckpointFormatVersion getVersion() {
      org.tensorflow.util.SaverDef.CheckpointFormatVersion result = org.tensorflow.util.SaverDef.CheckpointFormatVersion.valueOf(version_);
      return result == null ? org.tensorflow.util.SaverDef.CheckpointFormatVersion.UNRECOGNIZED : result;
    }
docs: <code>optional .tensorflow.SaverDef.CheckpointFormatVersion version = 7;</code>