emit(operationIdentifier, clock.getCurrentTime(), details);
    }

    @Override
    public void emitNowIfCurrent(Object details) {
        emitIfCurrent(clock.getCurrentTime(), details);
    }

    @Override
    public void emitIfCurrent(long time, Object details) {
        OperationIdentifier currentOperationIdentifier = current.getId();
        if (currentOperationIdentifier != null) {

    public void emitNow(@Nullable OperationIdentifier operationIdentifier, @Nullable Object details) {}

    @Override
    public void emitNowIfCurrent(Object details) {}

    @Override
    public void emitIfCurrent(long time, Object details) {}

    @Override
    public void emitNowForCurrent(Object details) {}

    void emitNow(@Nullable OperationIdentifier operationIdentifier, @Nullable Object details);
    void emitNowIfCurrent(Object details);

    void emitIfCurrent(long time, Object details);

    void emitNowForCurrent(Object details);