protected function _getDefaultExtraLeftButtons()
    {
        $buttons = [];

        $action = $this->_action();
        if ($action instanceof EditAction) {
            $buttons[] = [
                'title' => __d('crud', 'Delete'),
                'url' => ['action' => 'delete'],
                'options' => [
                    'block' => 'form.after_end',
                    'class' => 'btn btn-danger btn-delete',
                    'confirm' => __d('crud', 'Are you sure you want to delete this record?'),
                    'name' => '_delete',
                    'style' => 'margin-left: 0',
                ],
                'type' => 'postLink',
                '_label' => 'delete',
            ];
        }

        return $buttons;
    }