private static PsiPrefixExpression createNegatedExpression(PsiExpression otherOperand) {
      PsiPrefixExpression expression = (PsiPrefixExpression)createExpression(otherOperand.getManager(), "!(xxx)");
      assert expression != null;
      PsiExpression operand = expression.getOperand();
      assert operand != null;
      try {
        operand.replace(otherOperand);
      }
      catch (IncorrectOperationException e) {
        LOG.error(e);
      }
      return expression;
    }
private static PsiPrefixExpression createNegatedExpression(PsiExpression otherOperand)