private static void unwrapYieldValue(PsiStatement body, PsiYieldStatement yieldStatement) {
      PsiExpression valueExpression = yieldStatement.getExpression();
      if (valueExpression != null) {
        PsiElementFactory factory = JavaPsiFacade.getElementFactory(body.getProject());
        PsiExpressionStatement statement = (PsiExpressionStatement)factory.createStatementFromText("x=1;", body);
        statement.getExpression().replace(valueExpression);

        CommentTracker tracker = new CommentTracker();
        // replaceAndRestoreComments() will work with a copy of the expression, so it won't see the original comments
        tracker.markUnchanged(valueExpression);
        tracker.replaceAndRestoreComments(body, statement);
      }
    }
private static void unwrapYieldValue(PsiStatement body, PsiYieldStatement yieldStatement)