import { AnyAction } from 'redux';
import { Fullscreen } from '@shopify/app-bridge/actions';
/**
 * The default value for the fullscreen store
 * @internal
 * @beta
 */
export declare const defaultFullscreenStore = false;
/**
 * Returns the updated fullscreen state
 * @internal
 * @beta
 */
export default function fullscreenReducer(state: boolean | undefined, action: Fullscreen.FullscreenAction | AnyAction): boolean;