如何覆盖类方法

我想覆盖该方法Selenium::WebDriver.for.这是我试过的:

module SeleniumWebDriverExtension
  def self.for(browser, *args)
    if browser != :phantomjs
      super(browser, *args)
    else
      options = {
          "phantomjs.cli.args" => ["--ssl-protocol=tlsv1"]
      }
      capabilities = Selenium::WebDriver::Remote::Capabilities.phantomjs(options)
      super(browser, desired_capabilities: capabilities)
    end
  end
end

Selenium::WebDriver.prepend(SeleniumWebDriverExtension)

但是我在Selenium::Webdriver.for(:phantomjs)调用时遇到错误.

NoMethodError: super: no superclass method `for' for Selenium::WebDriver::Driver:Class

如何从重写方法调用原始方法？

module SeleniumWebDriverExtension
  def for(browser, *args)
    ...
  end
end

Selenium::WebDriver.singleton_class.prepend(SeleniumWebDriverExtension)