docs: def grok_filter_name(element):
      """Extracts the name, which may be embedded, for a Jinja2
      filter node"""
      e_name = None
      if element.name == 'default':
          if isinstance(element.node, jinja2.nodes.Getattr):
              e_name = element.node.node.name
          else:
              e_name = element.node.name
  
      return e_name