import { Clearable } from '@johngw/stream/types/Clearable';
/**
 * An in-memory storage class.
 *
 * @group Storages
 */
export declare class MemoryStorage implements Storage, Clearable {
    #private;
    get length(): number;
    clear(): void;
    getItem(key: string): string | null;
    key(index: number): string;
    removeItem(key: string): void;
    setItem(key: string, value: string): void;
}