public CommandResult Execute(IWebDriver driver, CommandDesc command)
        {
            try
            {
                var result = new CommandResult { Command = command };

                var timeout = GetTimeout(command);
                var complexSelector = WebDriverExtensions.GetContainsSelector(command.Selector);
                var by = WebDriverExtensions.GetBy(complexSelector.SimpleSelector);

                var elements = driver.FindElements(by);
                if (elements.Any())
                    driver.WaitForNotElement(by, timeout.GetValueOrDefault(WebDriverExtensions.DEFAULT_TIMEOUT));
                elements = driver.FindElements(by);

                var count = elements.Count();
                if (count > 0)
                    throw new Exception("Element was found.");

                return result;
            }
            catch (Exception ex)
            {
                return new CommandResult
                {
                    Command = command,
                    HasError = true,
                    Comments = ex.Message
                };
            }
        }