code: function nodeWalkAll(node, predicate, matches, getChildNodes) {
    if (getChildNodes === void 0) {
      getChildNodes = module.exports.defaultChildNodes;
    }
    if (!matches) {
      matches = [];
    }
    if (predicate(node)) {
      matches.push(node);
    }
    var childNodes = getChildNodes(node);
    if (childNodes) {
      for (var i = 0; i < childNodes.length; i++) {
        nodeWalkAll(childNodes[i], predicate, matches, getChildNodes);
      }
    }
    return matches;
  }
docs: Walk the tree down from `node`, applying the `predicate` function.
  All nodes matching the predicate function from `node` to leaves will be
  returned.