code: function (cb) {
      var i;
      log('[Caching] Setting activate handler', cb, this.pendingActivations);
      this.activateHandler = cb;
      for (i=0; i<this.pendingActivations.length; i++) {
        cb(this.pendingActivations[i]);
      }
      delete this.pendingActivations;
    }
docs: Set a callback for when caching is activated for a path.
  
  @param {function} callback - Callback function