docs: function sn_api_user_registerUrlHelperFunction(name, func) {
      if (typeof func !== "function") {
        return;
      }
      if (sn_api_user_urlHelperFunctions === undefined) {
        sn_api_user_urlHelperFunctions = [];
      }
      name = name.replace(/[^0-9a-zA-Z_]/, "");
      sn_api_user_urlHelperFunctions.push({
        name: name,
        func: func
      });
    }