code: def get_one_optional(self, locator):
          
          try:
              components = self.find(locator, False)
              return components[0] if len(components) > 0 else None
          except Exception as ex:
              return None
docs: Gets an optional component reference that matches specified locator.
  
          :param locator: the locator to find references by.
  
          :return: a matching component reference or null if nothing was found.