@Override
  public void incrementRows(List<TIncrement> tincrements) throws IOError, TException {
    if (conf.getBoolean(COALESCE_INC_KEY, false)) {
      this.coalescer.queueIncrements(tincrements);
      return;
    }
    for (TIncrement tinc : tincrements) {
      increment(tinc);
    }
  }
Note: this internal interface is slightly different from public APIs in regard to handling of
the qualifier. Here we differ from the public Java API in that null != byte[0]. Rather, we
respect qual == null as a request for the entire column family. The caller (
{@link #getVerTs(ByteBuffer, ByteBuffer, ByteBuffer, long, int, Map)}) interface IS consistent
in that the column is parse like normal.
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHBaseServiceHandler.java