/**
 * Copyright 2017 Google Inc. All rights reserved.
 * Modifications copyright (c) Microsoft Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
type EventEmitterLike = {
    on(eventName: string | symbol, handler: (...args: any[]) => unknown): unknown;
    removeListener(eventName: string | symbol, handler: (...args: any[]) => unknown): unknown;
};
export type RegisteredListener = {
    emitter: EventEmitterLike;
    eventName: (string | symbol);
    handler: (...args: any[]) => void;
    dispose: () => Promise<void>;
};
declare class EventsHelper {
    static addEventListener(emitter: EventEmitterLike, eventName: (string | symbol), handler: (...args: any[]) => void): RegisteredListener;
    static removeEventListeners(listeners: Array<{
        emitter: EventEmitterLike;
        eventName: (string | symbol);
        handler: (...args: any[]) => void;
    }>): void;
}
export declare const eventsHelper: typeof EventsHelper;
export {};
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