code: function create_node_by_path(context, path, len, tracker) {
  	let node = context.state.rootNode;
  	for (let i = 0; i < len; i++) {
  		const k = path[i];
  		if (k == "_") continue;
  		if (k == "#") {
  			node = context.state.rootNode;
  			continue;
  		}
  		if (node_type(node[k]) != NodeTypes.NODE) {
  			commit_node_prop(context, node, k, create_node(), tracker);
  		}
  		node = node[k];
  	}
  	return node;
  }
docs: Follow path create node if not existed
  @param {*} context
  @param {*} node
  @param {*} keys
  @param {*} len
  @param {*} tracker