public Couple<String> getStartEnd(PsiLoopStatement loopStatement, CommentTracker ct) {
      if (loopStatement instanceof PsiForStatement) {
        CountingLoop loop = CountingLoop.from((PsiForStatement)loopStatement);
        if (loop == null) return null;

        String start, end;
        if (loop.isDescending()) {
          start = loop.isIncluding() ? ct.text(loop.getBound()) : JavaPsiMathUtil.add(loop.getBound(), 1, ct);
          end = JavaPsiMathUtil.add(loop.getInitializer(), 1, ct);
        }
        else {
          start = ct.text(loop.getInitializer());
          end = loop.isIncluding() ? JavaPsiMathUtil.add(loop.getBound(), 1, ct) : ct.text(loop.getBound());
        }
        return Couple.of(start, end);
      }
      if (loopStatement instanceof PsiWhileStatement) {
        PsiBinaryExpression condition =
          tryCast(PsiUtil.skipParenthesizedExprDown(((PsiWhileStatement)loopStatement).getCondition()), PsiBinaryExpression.class);
        if (condition == null) return null;
        RelationType relationType = DfaPsiUtil.getRelationByToken(condition.getOperationTokenType());
        if (relationType == null) return null;
        PsiExpression left = condition.getLOperand();
        PsiExpression right = condition.getROperand();
        if (right == null) return null;
        String start, end;
        switch (relationType) {
          case GE -> {
            start = JavaPsiMathUtil.add(right, -1, ct);
            end = ct.text(left);
          }
          case GT -> {
            start = ct.text(right);
            end = ct.text(left);
          }
          case LE -> {
            start = JavaPsiMathUtil.add(left, -1, ct);
            end = ct.text(right);
          }
          case LT -> {
            start = ct.text(left);
            end = ct.text(right);
          }
          default -> {
            return null;
          }
        }
        return Couple.of(start, end);
      }
      return null;
    }
public Couple<String> getStartEnd(PsiLoopStatement loopStatement, CommentTracker ct)