@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // NAME
          return NAME;
        case 2: // SERIALIZATION_LIB
          return SERIALIZATION_LIB;
        case 3: // PARAMETERS
          return PARAMETERS;
        case 4: // DESCRIPTION
          return DESCRIPTION;
        case 5: // SERIALIZER_CLASS
          return SERIALIZER_CLASS;
        case 6: // DESERIALIZER_CLASS
          return DESERIALIZER_CLASS;
        case 7: // SERDE_TYPE
          return SERDE_TYPE;
        default:
          return null;
      }
    }
Find the _Fields constant that matches fieldId, or null if its not found.
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/SerDeInfo.java