/*
 * Copyright (c) 2021-2024 Huawei Device Co., Ltd.
 * 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.
 */

/**
 * @file
 * @kit BasicServicesKit
 */

import { Callback } from './@ohos.base';

/**
 * Provides methods for sending and processing in-process events.
 *
 * @namespace emitter
 * @syscap SystemCapability.Notification.Emitter
 * @since 7
 */
/**
 * Provides methods for sending and processing in-process events.
 *
 * @namespace emitter
 * @syscap SystemCapability.Notification.Emitter
 * @atomicservice
 * @since 11
 */
/**
 * Provides methods for sending and processing in-process events.
 *
 * @namespace emitter
 * @syscap SystemCapability.Notification.Emitter
 * @crossplatform
 * @atomicservice
 * @since arkts {'1.1':'12', '1.2':'20'}
 * @arkts 1.1&1.2
 */
declare namespace emitter {
  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { InnerEvent } event - Event to subscribe to in persistent manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { InnerEvent } event - Event to subscribe to in persistent manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { InnerEvent } event - Event to subscribe to in persistent manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function on(event: InnerEvent, callback: Callback<EventData>): void;

  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { string } eventId - Event to subscribe to in persistent manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { string } eventId - Event to subscribe to in persistent manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function on(eventId: string, callback: Callback<EventData>): void;

  /**
   * Subscribes to an event in persistent manner and executes a callback after the event is received.
   *
   * @param { string } eventId - Event to subscribe to in persistent manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<GenericEventData<T>> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function on<T>(eventId: string, callback: Callback<GenericEventData<T>>): void;

  /**
   * Subscribe to a event by specific id in persistent manner and receives the event callback.
   *
   * @param { string } eventId - indicate ID of the event to subscribe to.
   * @param { Callback<EventData> | Callback<GenericEventData<T>> } callback - indicate callback used to receive the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since 20
   * @arkts 1.2
   */
  function on<T>(eventId: string, callback: Callback<EventData> | Callback<GenericEventData<T>>): void;

  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { InnerEvent } event - Event to subscribe to in one-shot manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { InnerEvent } event - Event to subscribe to in one-shot manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { InnerEvent } event - Event to subscribe to in one-shot manner. The EventPriority parameter is not required and does not take effect.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function once(event: InnerEvent, callback: Callback<EventData>): void;

  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { string } eventId - Event to subscribe to in one-shot manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { string } eventId - Event to subscribe to in one-shot manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function once(eventId: string, callback: Callback<EventData>): void;

  /**
   * Subscribes to an event in one-shot manner and unsubscribes from it after the event callback is executed.
   *
   * @param { string } eventId - Event to subscribe to in one-shot manner. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<GenericEventData<T>> } callback - Callback to be executed when the event is received.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function once<T>(eventId: string, callback: Callback<GenericEventData<T>>): void;

  /**
   * Unsubscribes from all events with the specified event ID.
   *
   * @param { number } eventId - Event ID.
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Unsubscribes from all events with the specified event ID.
   *
   * @param { number } eventId - Event ID.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Unsubscribes from all events with the specified event ID.
   *
   * @param { number } eventId - Event ID.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function off(eventId: number): void;

  /**
   * Unsubscribes from all events with the specified event ID.
   *
   * @param { string } eventId - Event ID. The value cannot be an empty string and exceed 10240 bytes.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Unsubscribes from all events with the specified event ID.
   *
   * @param { string } eventId - Event ID. The value cannot be an empty string and exceed 10240 bytes.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function off(eventId: string): void;

  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { number } eventId - Event ID.
   * @param { Callback<EventData> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @since 10
   */
  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { number } eventId - Event ID.
   * @param { Callback<EventData> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { number } eventId - Event ID.
   * @param { Callback<EventData> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function off(eventId: number, callback: Callback<EventData>): void;

  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { string } eventId - Event ID. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { string } eventId - Event ID. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<EventData> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function off(eventId: string, callback: Callback<EventData>): void;

  /**
   * Unsubscribes from an event with the specified event ID and processed by the specified callback.
   * This API takes effect only when Callback<EventData> has been registered through the on or once API.
   * Otherwise, no processing is performed.
   *
   * @param { string } eventId - Event ID. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Callback<GenericEventData<T>> } callback - Callback to unregister.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function off<T>(eventId: string, callback: Callback<GenericEventData<T>>): void;

  /**
   * Unsubscribe specified callback function  from an event.
   *
   * @param { string } eventId - indicates ID of the event to unsubscribe from.
   * @param { Callback<EventData> | Callback<GenericEventData<T>> } callback - indicates callback used to receive the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since 20
   * @arkts 1.2
   */
  function off<T>(eventId: string, callback: Callback<EventData> | Callback<GenericEventData<T>>): void;

  /**
   * Emits the specified event.
   *
   * @param { InnerEvent } event - Event to emit, where EventPriority specifies the emit priority of the event.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Emits the specified event.
   *
   * @param { InnerEvent } event - Event to emit, where EventPriority specifies the emit priority of the event.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Emits the specified event.
   *
   * @param { InnerEvent } event - Event to emit, where EventPriority specifies the emit priority of the event.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function emit(event: InnerEvent, data?: EventData): void;

  /**
   * Emits the specified event.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Emits the specified event.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function emit(eventId: string, data?: EventData): void;

  /**
   * Emits the specified event.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { GenericEventData<T> } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function emit<T>(eventId: string, data?: GenericEventData<T>): void;

  /**
   * Emits an event by specific id to the event queue.
   *
   * @param { string } eventId - indicate ID of the event to emit.
   * @param { EventData | GenericEventData<T> } [data] - indicate data carried by the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since 20
   * @arkts 1.2
   */
  function emit<T>(eventId: string, data?: EventData | GenericEventData<T>): void;

  /**
   * Emits an event of a specified priority.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Options } options - Event emit priority.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Emits an event of a specified priority.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Options } options - Event emit priority.
   * @param { EventData } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function emit(eventId: string, options: Options, data?: EventData): void;

  /**
   * Emits an event of a specified priority.
   *
   * @param { string } eventId - ID of the event to emit. The value cannot be an empty string and exceed 10240 bytes.
   * @param { Options } options - Event emit priority.
   * @param { GenericEventData<T> } [data] - Data passed in the event.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function emit<T>(eventId: string, options: Options, data?: GenericEventData<T>): void;

  /**
   * Obtains the number of subscriptions to a specified event.
   *
   * @param { number | string } eventId - Event ID. The value of the string type cannot be an empty string.
   * @returns { number } Returns the number of listener count.
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Obtains the number of subscriptions to a specified event.
   *
   * @param { number | string } eventId - Event ID. The value of the string type cannot be an empty string.
   * @returns { number } Returns the number of listener count.
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  function getListenerCount(eventId: number | string): number;

  /**
   * Describes data passed in the event.
   *
   * @typedef EventData
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Describes data passed in the event.
   *
   * @typedef EventData
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Describes data passed in the event.
   *
   * @typedef EventData
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  export interface EventData {
    /**
     * Data passed in the event.
     *
     * @type { ?object }
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * Data passed in the event.
     *
     * @type { ?object }
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * Data passed in the event.
     *
     * @type { ?object }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since 12
     */
    data?: { [key: string]: any };

    /**
     * Data carried by the event.
     *
     * @type { ?Record<string, Object> }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @since 20
     * @arkts 1.2
     */
    data?: Record<string, Object>;
  }

  /**
   * Describes an event to subscribe to or emit. The EventPriority settings do not take effect under event subscription.
   *
   * @typedef InnerEvent
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Describes an event to subscribe to or emit. The EventPriority settings do not take effect under event subscription.
   *
   * @typedef InnerEvent
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Describes an event to subscribe to or emit. The EventPriority settings do not take effect under event subscription.
   *
   * @typedef InnerEvent
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  export interface InnerEvent {
    /**
     * Event ID.
     *
     * @type { number }
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * Event ID.
     *
     * @type { number }
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * Event ID.
     *
     * @type { number }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    eventId: number;

    /**
     * Event priority. The default value is EventPriority.LOW.
     *
     * @type { ?EventPriority }
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * Event priority. The default value is EventPriority.LOW.
     *
     * @type { ?EventPriority }
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * Event priority. The default value is EventPriority.LOW.
     *
     * @type { ?EventPriority }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    priority?: EventPriority;
  }

  /**
   * Enumerates the event priorities.
   *
   * @enum { number }
   * @syscap SystemCapability.Notification.Emitter
   * @since 7
   */
  /**
   * Enumerates the event priorities.
   *
   * @enum { number }
   * @syscap SystemCapability.Notification.Emitter
   * @atomicservice
   * @since 11
   */
  /**
   * Enumerates the event priorities.
   *
   * @enum { number }
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  export enum EventPriority {
    /**
     * The event will be emitted immediately.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * The event will be emitted immediately.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * The event will be emitted immediately.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    IMMEDIATE = 0,

    /**
     * The event will be emitted before low-priority events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * The event will be emitted before low-priority events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * The event will be emitted before low-priority events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    HIGH,

    /**
     * The event will be emitted before idle-priority events. By default, an event is in LOW priority.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * The event will be emitted before idle-priority events. By default, an event is in LOW priority.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * The event will be emitted before idle-priority events. By default, an event is in LOW priority.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    LOW,

    /**
     * The event will be emitted after all the other events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @since 7
     */
    /**
     * The event will be emitted after all the other events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * The event will be emitted after all the other events.
     *
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    IDLE,
  }

  /**
   * Describes the event emit priority.
   *
   * @typedef Options
   * @syscap SystemCapability.Notification.Emitter
   * @since 11
   */
  /**
   * Describes the event emit priority.
   *
   * @typedef Options
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  export interface Options {
    /**
     * Event priority. The default value is EventPriority.LOW.
     *
     * @type { ?EventPriority }
     * @syscap SystemCapability.Notification.Emitter
     * @atomicservice
     * @since 11
     */
    /**
     * Event priority. The default value is EventPriority.LOW.
     *
     * @type { ?EventPriority }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    priority?: EventPriority;
  }

  /**
   * Describes the generic data passed in the event.
   *
   * @typedef GenericEventData<T>
   * @syscap SystemCapability.Notification.Emitter
   * @crossplatform
   * @atomicservice
   * @since arkts {'1.1':'12', '1.2':'20'}
   * @arkts 1.1&1.2
   */
  export interface GenericEventData<T> {
    /**
     * Data passed in the event. T: generic type.
     *
     * @type { ?T }
     * @syscap SystemCapability.Notification.Emitter
     * @crossplatform
     * @atomicservice
     * @since arkts {'1.1':'12', '1.2':'20'}
     * @arkts 1.1&1.2
     */
    data?: T;
  }
}

export default emitter;