const filter = $tw.wiki.getCacheForTiddler(this.nodeFilterTRef, "tmap-nodeFilter", () => {

      let filter = utils.makeHashMap();
      const tObj = $tw.wiki.getTiddler(this.nodeFilterTRef);

      filter.raw = (tObj && tObj.fields.filter) || '';
      filter.pretty = utils.getPrettyFilter(filter.raw);
      filter.compiled = $tw.wiki.compileFilter(filter.raw);

      return filter;

    });
    const filter = $tw.wiki.getCacheForTiddler(this.edgeTypeFilterTRef, "tmap-edgeTypeFilter", () => {

      const allETy = $tm.indeces.allETy;
      const src = Object.keys(allETy);
      const tObj = $tw.wiki.getTiddler(this.edgeTypeFilterTRef);

      let filter = {};
      filter.raw = (tObj && tObj.fields.filter || '');
      filter.pretty = utils.getPrettyFilter(filter.raw);
      filter.matches = utils.getEdgeTypeMatches(filter.raw, allETy);
      filter.whitelist = utils.getLookupTable(filter.matches);

      return filter;

    });