export declare function defaultQueueMicrotask(fn: () => void): void;
export interface QueueMicrotask {
    (callback: () => void): void;
}
export declare const NEW_QUEUE: unique symbol;
export declare const RESET_QUEUE: unique symbol;
export declare function shiftingQueueMicrotask(macrotaskLimit?: number): QueueMicrotask;
export declare function resetQueueIfExists(queue: QueueMicrotask): void;
export declare function newQueueIfExists(queue: QueueMicrotask): QueueMicrotask;