protected function defaultSidebarActions()
    {
        if ($this->defaultSidebarActions === null) {
            $this->defaultSidebarActions = [];

            if ($this->form()) {
                $save = [
                    'label'      => $this->form()->submitLabel(),
                    'ident'      => 'save',
                    'buttonType' => 'submit',
                    'priority'   => 90
                ];
                $this->defaultSidebarActions[] = $save;
            }
        }

        return $this->defaultSidebarActions;
    }