code: func NewBridge(ub URLBuilder, source SourceRecord, actor ActorRecord, request RequestRecord, sink Sink, includeReferences bool) Listener {
  	return &bridge{
  		ub:                ub,
  		includeReferences: includeReferences,
  		actor:             actor,
  		source:            source,
  		request:           request,
  		sink:              sink,
  	}
  }
docs: // NewBridge returns a notification listener that writes records to sink,
  // using the actor and source. Any urls populated in the events created by
  // this bridge will be created using the URLBuilder.
  // TODO(stevvooe): Update this to simply take a context.Context object.