/**
 * An emitter which queue all events and then process them at the
 * end of the event loop.
 */
import { Emitter, EmitterOptions } from './emitter';
export declare class MicrotaskEmitter<T> extends Emitter<T> {
    private _queuedEvents;
    private readonly _mergeFn?;
    constructor(options?: EmitterOptions & {
        merge?: (input: T[]) => T;
    });
    emit(event: T): boolean;
}