public byte[] getServerName() {
    setServerName(org.apache.thrift.TBaseHelper.rightSize(serverName));
    return serverName == null ? null : serverName.array();
  }
Returns true if field version is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TRegionInfo.java