@Override
  public Cell getNextCellHint(Cell cell) {
    return PrivateCellUtil.createFirstOnRowCol(cell, prefix, 0, prefix.length);
  }
Returns true if and only if the fields of the filter that are serialized are equal to the
corresponding fields in other. Used for testing.
hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnPrefixFilter.java