code: def check_css_selectors(webdriver, *selectors):
          
          for selector in selectors:
              try:
                  webdriver.find_element_by_css_selector(selector)
              except:
                  return False  # A selector failed.
  
          return True
docs: Returns true if all CSS selectors passed in is found.  This can be used 
          to quickly validate a page.
  
          Args:
              webdriver (Webdriver) : Selenium Webdriver instance
              selectors (str) : N number of CSS selectors strings to match against the page.
  
          Returns:
              True, False - if the page matches all selectors.
  
          Usage Example::
  
              # Checks for a Form with id='loginForm' and a button with class 'login'
              if not PageObjectUtils.check_css_selectors("form#loginForm", "button.login"):
                  raise InvalidPageError("This is not the login page.")
  
          You can use this within a PageObject's `_validate_page(webdriver)` method for 
          validating pages.