public function onRefresh()
    {
        $result = [];
        $saveData = $this->getSaveData();

        /**
         * @event backend.form.beforeRefresh
         * Called before the form is refreshed, modify the $dataHolder->data property in place
         *
         * Example usage:
         *
         *     Event::listen('backend.form.beforeRefresh', function((\Backend\Widgets\Form) $formWidget, (stdClass) $dataHolder) {
         *         $dataHolder->data = $arrayOfSaveDataToReplaceExistingDataWith;
         *     });
         *
         * Or
         *
         *     $formWidget->bindEvent('form.beforeRefresh', function ((stdClass) $dataHolder) {
         *         $dataHolder->data = $arrayOfSaveDataToReplaceExistingDataWith;
         *     });
         *
         */
        $dataHolder = (object) ['data' => $saveData];
        $this->fireSystemEvent('backend.form.beforeRefresh', [$dataHolder]);
        $saveData = $dataHolder->data;

        /*
         * Set the form variables and prepare the widget
         */
        $this->setFormValues($saveData);
        $this->prepareVars();

        /**
         * @event backend.form.refreshFields
         * Called when the form is refreshed, giving the opportunity to modify the form fields
         *
         * Example usage:
         *
         *     Event::listen('backend.form.refreshFields', function((\Backend\Widgets\Form) $formWidget, (array) $allFields) {
         *         $allFields['name']->required = false;
         *     });
         *
         * Or
         *
         *     $formWidget->bindEvent('form.refreshFields', function ((array) $allFields) {
         *         $allFields['name']->required = false;
         *     });
         *
         */
        $this->fireSystemEvent('backend.form.refreshFields', [$this->allFields]);

        /*
         * If an array of fields is supplied, update specified fields individually.
         */
        if (($updateFields = post('fields')) && is_array($updateFields)) {

            foreach ($updateFields as $field) {
                if (!isset($this->allFields[$field])) {
                    continue;
                }

                /** @var FormWidgetBase $fieldObject */
                $fieldObject = $this->allFields[$field];
                $result['#' . $fieldObject->getId('group')] = $this->makePartial('field', ['field' => $fieldObject]);
            }
        }

        /*
         * Update the whole form
         */
        if (empty($result)) {
            $result = ['#'.$this->getId() => $this->makePartial('form')];
        }

        /**
         * @event backend.form.refresh
         * Called after the form is refreshed, should return an array of additional result parameters.
         *
         * Example usage:
         *
         *     Event::listen('backend.form.refresh', function((\Backend\Widgets\Form) $formWidget, (array) $result) {
         *         $result['#my-partial-id' => $formWidget->makePartial('$/path/to/custom/backend/partial.htm')];
         *         return $result;
         *     });
         *
         * Or
         *
         *     $formWidget->bindEvent('form.refresh', function ((array) $result) use ((\Backend\Widgets\Form $formWidget)) {
         *         $result['#my-partial-id' => $formWidget->makePartial('$/path/to/custom/backend/partial.htm')];
         *         return $result;
         *     });
         *
         */
        $eventResults = $this->fireSystemEvent('backend.form.refresh', [$result], false);

        foreach ($eventResults as $eventResult) {
            $result = $eventResult + $result;
        }

        return $result;
    }