public void addToRows(java.util.List<java.lang.String> elem) {
    if (this.rows == null) {
      this.rows = new java.util.ArrayList<java.util.List<java.lang.String>>();
    }
    this.rows.add(elem);
  }
Returns true if field headerNames is set (has been assigned a value) and false otherwise
service-rpc/src/gen/thrift/gen-javabean/org/apache/hive/service/rpc/thrift/TProgressUpdateResp.java