getTopGraph().then((g) => {

      this.graph = g;

      this.musicSetup(); // async

      this.graph.runHandler(this.graphChanged.bind(this), "loadsongs");

    });

  }

  graphChanged() {

    this.songList = [];

    try {

      const playList = this.graph.uriValue(

        //

        this.graph.Uri(":playList")

      );

      log(playList);

      this.songList = this.graph.items(playList) as NamedNode[];

    } catch (e) {

      log("no playlist yet");

    }

    log(this.songList.length);

  }

}