@Override
  public void reset() {
    this.count = 0;
  }
Simple filter that returns first N columns on row only. This filter was written to test filters
in Get and as soon as it gets its quota of columns, {@link #filterAllRemaining()} returns true.
This makes this filter unsuitable as a Scan filter.
hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnCountGetFilter.java