/** What a `ButtonGroup` decides for its buttons: their size and shape, and with `selection` which are selected. */
export interface ButtonGroupContext {
    readonly selection: 'single' | 'multiple' | undefined;
    readonly size: 'xs' | 's' | 'm' | 'l' | 'xl' | undefined;
    readonly shape: 'round' | 'square' | undefined;
    isSelected: (value: string) => boolean;
    toggle: (value: string) => void;
}
export declare const setButtonGroupContext: (context: ButtonGroupContext) => ButtonGroupContext;
export declare const getButtonGroupContext: () => ButtonGroupContext | undefined;