code: public org.tensorflow.framework.CollectionDef.Int64List getInt64List() {
      if (kindCase_ == 3) {
         return (org.tensorflow.framework.CollectionDef.Int64List) kind_;
      }
      return org.tensorflow.framework.CollectionDef.Int64List.getDefaultInstance();
    }
docs: <code>optional .tensorflow.CollectionDef.Int64List int64_list = 3;</code>