export type AsyncStorageType = {
    getItemSync?: (key: string) => string | null;
    getItem: (key: string, cb?: (err: Error | null, res: string | null) => void) => Promise<string | null>;
    setItem: (key: string, value: string) => Promise<string | null>;
} | null;
declare const AsyncStorage: AsyncStorageType;
export default AsyncStorage;