@org.apache.amoro.shade.thrift.org.apache.thrift.annotation.Nullable
    @Override
    public _Fields fieldForId(int fieldId) {
      return _Fields.findByThriftId(fieldId);
    }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
amoro-common/src/main/gen-java/org/apache/amoro/api/OptimizingService.java