@Override
      public String toString() {
        return ("{disk data knownTornStart=" + knownTornStart
            + ", firstRowStart=" + firstRowStart + ", lastRowStart="
            + lastRowStart + ", lastRowEnd=" + lastRowEnd + ", rowCount=" + rowCount
            + ", encodings=" + encodings + ", streams=" + colStreams + "}").replace('\n', ' ');
      }
Gets the end offset of the current row, or -1 if unknown.
llap-server/src/java/org/apache/hadoop/hive/llap/io/encoded/SerDeEncodedDataReader.java