docs: def find_by_name(name, engines=None):
      """
      Find a template engine class specified by its name `name`.
  
      :param name: Template name
      :param engines: Template engines
  
      :return: A template engine or None if no any template engine of given name
          were found.
      """
      if engines is None:
          engines = ENGINES
  
      for egn in engines:
          if egn.name() == name:
              return egn
  
      return None