@Override
  protected void processIntention(@NotNull PsiElement element, @NotNull ActionContext context, @NotNull ModPsiUpdater updater) {
    PsiElement parent = element.getParent();

    if (!"if".equals(element.getText()) || !(parent instanceof GrIfStatement parentIf)) {
      throw new IncorrectOperationException("Not invoked on an if");
    }
    GroovyPsiElementFactory groovyPsiElementFactory = GroovyPsiElementFactory.getInstance(context.project());

    GrExpression condition = parentIf.getCondition();
    if (condition == null) {
      throw new IncorrectOperationException("Invoked on an if with empty condition");
    }

    GrExpression negatedCondition = null;
    if (condition instanceof GrUnaryExpression unaryCondition) {
      if ("!".equals(unaryCondition.getOperationToken().getText())) {
        negatedCondition = stripParenthesis(unaryCondition.getOperand());
      }
    }

    if (negatedCondition == null) {
      // Now check whether this is a simple expression
      condition = stripParenthesis(condition);
      String negatedExpressionText;
      if (condition instanceof GrCallExpression || condition instanceof GrReferenceExpression) {
        negatedExpressionText = "!" + condition.getText();
      }
      else {
        negatedExpressionText = "!(" + condition.getText() + ")";
      }
      negatedCondition = groovyPsiElementFactory.createExpressionFromText(negatedExpressionText, parentIf);
    }


    GrStatement thenBranch = parentIf.getThenBranch();
    final boolean thenIsNotEmpty = isNotEmpty(thenBranch);

    String newIfText = "if (" + negatedCondition.getText() + ") {}";
    if (thenIsNotEmpty) {
      newIfText += " else {}";
    }

    GrIfStatement newIf = (GrIfStatement)groovyPsiElementFactory.createStatementFromText(newIfText, parentIf.getContext());
    generateElseBranchTextAndRemoveTailStatements(parentIf, newIf);

    if (thenIsNotEmpty) {
      final GrStatement elseBranch = newIf.getElseBranch();
      assert elseBranch != null;
      elseBranch.replaceWithStatement(thenBranch);
    }

    parentIf.replace(newIf);
  }
@Override
  protected void processIntention(@NotNull PsiElement element, @NotNull ActionContext context, @NotNull ModPsiUpdater updater)