export declare class LmvzButtonGroup {
    el: HTMLElement;
    private actionsSlot?;
    private validationMessageCache;
    private actionsStateObserver?;
    stacked: boolean;
    get primaryEnabledAction(): HTMLButtonElement | undefined;
    get hasActions(): boolean;
    componentDidLoad(): void;
    disconnectedCallback(): void;
    private get assignedElements();
    private get assignedButtons();
    private get visibleButtons();
    private get enabledButtons();
    private getActionValidationResult;
    private handleActionsSlotChange;
    private observeActionState;
    private syncActionsState;
    private focusPrimaryAction;
    private checkActions;
    render(): any;
}