isNodeIncludedById(node) {

    const regex = $tw.utils.escapeRegExp(ViewAbstraction._getNodeIdFilterPart(node));

    return this.getNodeFilter('raw').match(regex);

  }
Whether the node is already explicitly contained in the view's node filter,
i.e. whether it is explicitly referenced by its title.

@private

@param {Node} node
@return {string}