@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // NAME
          return NAME;
        case 2: // MAX_VERSIONS
          return MAX_VERSIONS;
        case 3: // COMPRESSION
          return COMPRESSION;
        case 4: // IN_MEMORY
          return IN_MEMORY;
        case 5: // BLOOM_FILTER_TYPE
          return BLOOM_FILTER_TYPE;
        case 6: // BLOOM_FILTER_VECTOR_SIZE
          return BLOOM_FILTER_VECTOR_SIZE;
        case 7: // BLOOM_FILTER_NB_HASHES
          return BLOOM_FILTER_NB_HASHES;
        case 8: // BLOCK_CACHE_ENABLED
          return BLOCK_CACHE_ENABLED;
        case 9: // TIME_TO_LIVE
          return TIME_TO_LIVE;
        default:
          return null;
      }
    }
Find the _Fields constant that matches fieldId, or null if its not found.
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/ColumnDescriptor.java