sclass LoggingBitHead > BitHead {
  class Event {
    long byteCounter = LoggingBitHead.this.byteCounter;
    int align = LoggingBitHead.this.align;
    int currentByte = LoggingBitHead.this.currentByte;
  }
  
  record WritingBit(bool b) > Event {}
  record WritingByte(int i) > Event {}
  
  event log(Event event);
  
  bool writeArraysSlowly() { true; }
  
  void writeBit(bool b) {
    log(new WritingBit(b));
    super.writeBit(b);
  }
  
  void writeByte(int i) {
    log(new WritingByte(i));
    super.writeByte(i);
  }
}