@Override
  public int getApproximateOutputLength(@Nullable CustomTemplateCallback callback) {
    int mul = myLeftOperand instanceof MulOperationNode ? ((MulOperationNode)myLeftOperand).getRightOperand() : 1;
    return myLeftOperand.getApproximateOutputLength(callback) + (myRightOperand.getApproximateOutputLength(callback) * mul);
  }
@Override
  public int getApproximateOutputLength(@Nullable CustomTemplateCallback callback)