@Override
    public void read(org.apache.thrift.protocol.TProtocol prot, ColumnDescriptor struct) throws org.apache.thrift.TException {
      org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
      java.util.BitSet incoming = iprot.readBitSet(9);
      if (incoming.get(0)) {
        struct.name = iprot.readBinary();
        struct.setNameIsSet(true);
      }
      if (incoming.get(1)) {
        struct.maxVersions = iprot.readI32();
        struct.setMaxVersionsIsSet(true);
      }
      if (incoming.get(2)) {
        struct.compression = iprot.readString();
        struct.setCompressionIsSet(true);
      }
      if (incoming.get(3)) {
        struct.inMemory = iprot.readBool();
        struct.setInMemoryIsSet(true);
      }
      if (incoming.get(4)) {
        struct.bloomFilterType = iprot.readString();
        struct.setBloomFilterTypeIsSet(true);
      }
      if (incoming.get(5)) {
        struct.bloomFilterVectorSize = iprot.readI32();
        struct.setBloomFilterVectorSizeIsSet(true);
      }
      if (incoming.get(6)) {
        struct.bloomFilterNbHashes = iprot.readI32();
        struct.setBloomFilterNbHashesIsSet(true);
      }
      if (incoming.get(7)) {
        struct.blockCacheEnabled = iprot.readBool();
        struct.setBlockCacheEnabledIsSet(true);
      }
      if (incoming.get(8)) {
        struct.timeToLive = iprot.readI32();
        struct.setTimeToLiveIsSet(true);
      }
    }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/ColumnDescriptor.java