addNode(node) {

    if (!this.isNodeIncludedById(node)) {

      // @see https://github.com/felixhayashi/TW5-TiddlyMap/issues/285
      if (
        utils.isTrue($tm.config.sys.alwaysAddNodeIdToViewFilter) ||
        !utils.isMatch(node.tRef, this.getNodeFilter('compiled'))
      ) {

        const part = ViewAbstraction._getNodeIdFilterPart(node);
        const separator = ' ';
        this.setNodeFilter(this.getNodeFilter('raw') + separator + part);

      }

      this.saveNodePosition(node);

    }

  }
Method to append a filter part to the current filter (*or*-style).
The node's tmap.id will be used in the filter to reference the corresponding tiddler.

@param {Node} node