private static String updateLastAddend(PsiPolyadicExpression polyadicExpression, String updatedAddend, CommentTracker ct) {
    PsiExpression lastElement = Objects.requireNonNull(ArrayUtil.getLastElement(polyadicExpression.getOperands()));
    PsiJavaToken lastToken = Objects.requireNonNull(polyadicExpression.getTokenBeforeOperand(lastElement));
    PsiElement from = polyadicExpression.getFirstChild();
    PsiElement to = lastToken.getPrevSibling();
    return StreamEx.iterate(from, PsiElement::getNextSibling).takeWhileInclusive(e -> !to.equals(e)).map(ct::text).joining() + updatedAddend;
  }
private static String updateLastAddend(PsiPolyadicExpression polyadicExpression, String updatedAddend, CommentTracker ct)