@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case START_KEY:
      return getStartKey();

    case END_KEY:
      return getEndKey();

    case ID:
      return getId();

    case NAME:
      return getName();

    case VERSION:
      return getVersion();

    case SERVER_NAME:
      return getServerName();

    case PORT:
      return getPort();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field port is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TRegionInfo.java