Follow-up of pr #12344

src/shared/xml_parser.js

@@ -329,6 +329,18 @@ class SimpleDOMNode {
     return this.childNodes && this.childNodes.length > 0;
   }
 
+  /**
+   * Search a node in the tree with the given path
+   * foo.bar[nnn], i.e. find the nnn-th node named
+   * bar under a node named foo.
+   *
+   * @param {Array} paths - an array of objects as
+   * returned by {parseXFAPath}.
+   * @param {number} pos - the current position in
+   * the paths array.
+   * @returns {SimpleDOMNode} The node corresponding
+   * to the path or null if not found.
+   */
   searchNode(paths, pos) {
     if (pos >= paths.length) {
       return this;