code: function(id) {
              if (this._parent.prototype._onBeforeManualRetry.apply(this, arguments)) {
                  this._templating.resetProgress(id);
                  qq(this._templating.getFileContainer(id)).removeClass(this._classes.fail);
                  this._templating.setStatusText(id);
                  this._templating.showSpinner(id);
                  this._showCancelLink(id);
                  return true;
              }
              else {
                  qq(this._templating.getFileContainer(id)).addClass(this._classes.retryable);
                  this._templating.showRetry(id);
                  return false;
              }
          }
docs: return false if we should not attempt the requested retry