code: private void incrementOpCodeCount(Byte opCode) {
      if(!opCodeCount.containsKey(opCode)) {
        opCodeCount.put(opCode, 0L);
      }
      Long newValue = opCodeCount.get(opCode) + 1;
      opCodeCount.put(opCode, newValue);
    }
docs: Increment the op code counter
  
  @param opCode opCode for which to increment count