code: def element_or_none(self, using, value):
          
          try:
              return self._execute(Command.FIND_ELEMENT, {
                  'using': using,
                  'value': value
              })
          except:
              return None
docs: Check if an element in the current context.
  
          Support:
              Android iOS Web(WebView)
  
          Args:
              using(str): The element location strategy.
              value(str): The value of the location strategy.
  
          Returns:
              Return Element if the element does exists and return None otherwise.
  
          Raises:
              WebDriverException.