@Override
    public int hashCode() {
      int result = super.hashCode();
      result = 31 * result + (cause != null ? cause.hashCode() : 0);
      return result;
    }
This class is a glue object that connects Thrift RPC calls to the HBase client API primarily
defined in the Table interface.
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift2/ThriftHBaseServiceHandler.java