code: def _load_feed(path: str, view: View, config: nx.DiGraph) -> Feed:
      
      config_ = remove_node_attributes(config, ["converters", "transformations"])
      feed_ = Feed(path, view={}, config=config_)
      for filename, column_filters in view.items():
          config_ = reroot_graph(config_, filename)
          view_ = {filename: column_filters}
          feed_ = Feed(feed_, view=view_, config=config_)
      return Feed(feed_, config=config)
docs: Multi-file feed filtering