/*
 * Copyright (c) 2022-2025 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 AbilityKit
 */

import { AsyncCallback } from '../@ohos.base';
import Context from './Context';
import AbilityLifecycleCallback from '../@ohos.app.ability.AbilityLifecycleCallback';
import EnvironmentCallback from '../@ohos.app.ability.EnvironmentCallback';
import type ApplicationStateChangeCallback from '../@ohos.app.ability.ApplicationStateChangeCallback';
import { ProcessInformation } from './ProcessInformation';
import type ConfigurationConstant from '../@ohos.app.ability.ConfigurationConstant';
import Want from '../@ohos.app.ability.Want';

/**
 * The context of an application. It allows access to application-specific resources.
 *
 * @extends Context
 * @syscap SystemCapability.Ability.AbilityRuntime.Core
 * @stagemodelonly
 * @since 9
 */
/**
 * The context of an application. It allows access to application-specific resources.
 *
 * @extends Context
 * @syscap SystemCapability.Ability.AbilityRuntime.Core
 * @stagemodelonly
 * @crossplatform
 * @since 10
 */
/**
 * The context of an application. It allows access to application-specific resources.
 *
 * @extends Context
 * @syscap SystemCapability.Ability.AbilityRuntime.Core
 * @stagemodelonly
 * @crossplatform
 * @atomicservice
 * @since 11
 */
export default class ApplicationContext extends Context {
  /**
   * Register ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { AbilityLifecycleCallback } callback - The ability lifecycle callback.
   * @returns { number } Returns the number code of the callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Register ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { AbilityLifecycleCallback } callback - The ability lifecycle callback.
   * @returns { number } Returns the number code of the callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @since 10
   */
  /**
   * Register ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { AbilityLifecycleCallback } callback - The ability lifecycle callback.
   * @returns { number } Returns the number code of the callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  on(type: 'abilityLifecycle', callback: AbilityLifecycleCallback): number;

  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @param { AsyncCallback<void> } callback - The callback of off.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @param { AsyncCallback<void> } callback - The callback of off.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @since 10
   */
  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @param { AsyncCallback<void> } callback - The callback of off.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  off(type: 'abilityLifecycle', callbackId: number, callback: AsyncCallback<void>): void;

  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  /**
   * Unregister ability lifecycle callback.
   *
   * @param { 'abilityLifecycle' } type - abilityLifecycle.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  off(type: 'abilityLifecycle', callbackId: number): Promise<void>;

  /**
   * Register environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { EnvironmentCallback } callback - The environment callback.
   * @returns { number } Returns the number code of the callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Register environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { EnvironmentCallback } callback - The environment callback.
   * @returns { number } Returns the number code of the callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  on(type: 'environment', callback: EnvironmentCallback): number;

  /**
   * Unregister environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @param { AsyncCallback<void> } callback - The callback of unregisterEnvironmentCallback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Unregister environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @param { AsyncCallback<void> } callback - The callback of unregisterEnvironmentCallback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  off(type: 'environment', callbackId: number, callback: AsyncCallback<void>): void;

  /**
   * Unregister environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Unregister environment callback.
   *
   * @param { 'environment' } type - environment.
   * @param { number } callbackId - Indicates the number code of the callback.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  off(type: 'environment', callbackId: number): Promise<void>;

  /**
   * Register applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } callback - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 10
   */
  /**
   * Register applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } callback - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  /**
   * Register applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } callback - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  on(type: 'applicationStateChange', callback: ApplicationStateChangeCallback): void;

  /**
   * Unregister applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } [callback] - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 10
   */
  /**
   * Unregister applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } [callback] - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  /**
   * Unregister applicationStateChange callback.
   *
   * @param { 'applicationStateChange' } type - applicationStateChange.
   * @param { ApplicationStateChangeCallback } [callback] - The applicationStateChange callback.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  off(type: 'applicationStateChange', callback?: ApplicationStateChangeCallback): void;

  /**
   * Get information about running processes
   *
   * @returns { Promise<Array<ProcessInformation>> } Returns the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Get information about running processes
   *
   * @returns { Promise<Array<ProcessInformation>> } Returns the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @since 10
   */
  /**
   * Get information about running processes
   *
   * @returns { Promise<Array<ProcessInformation>> } Returns the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  getRunningProcessInformation(): Promise<Array<ProcessInformation>>;

  /**
   * Get information about running processes
   *
   * @param { AsyncCallback<Array<ProcessInformation>> } callback - The callback is used to return the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Get information about running processes
   *
   * @param { AsyncCallback<Array<ProcessInformation>> } callback - The callback is used to return the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @since 10
   */
  /**
   * Get information about running processes
   *
   * @param { AsyncCallback<Array<ProcessInformation>> } callback - The callback is used to return the array of {@link ProcessInformation}.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  getRunningProcessInformation(callback: AsyncCallback<Array<ProcessInformation>>): void;

  /**
   * Kill all processes of the application
   *
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Kill all processes of the application
   *
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  killAllProcesses(): Promise<void>;

  /**
   * Kill all processes of the application
   *
   * @param { boolean } clearPageStack - The flag that indicates whether the page stack need to be cleared.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 401 - If the input parameter is not valid parameter.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 14
   */
  killAllProcesses(clearPageStack: boolean): Promise<void>;

  /**
   * Kill all processes of the application
   *
   * @param { AsyncCallback<void> } callback - The callback of killAllProcesses.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 9
   */
  /**
   * Kill all processes of the application
   *
   * @param { AsyncCallback<void> } callback - The callback of killAllProcesses.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  killAllProcesses(callback: AsyncCallback<void>);

  /**
   * Set colorMode of the application
   *
   * @param { ConfigurationConstant.ColorMode } colorMode - Color mode.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  /**
   * Set colorMode of the application
   *
   * @param { ConfigurationConstant.ColorMode } colorMode - Color mode.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  setColorMode(colorMode: ConfigurationConstant.ColorMode): void;

  /**
   * Set language of the application
   *
   * @param { string } language - Language.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 11
   */
  setLanguage(language: string): void;

  /**
   * Clear up application data by app self
   *
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 11
   */
  clearUpApplicationData(): Promise<void>;

  /**
   * Clear up application data by app self
   *
   * @param { AsyncCallback<void> } callback - The callback of clearUpApplicationData.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 11
   */
  clearUpApplicationData(callback: AsyncCallback<void>): void;

  /**
   * Kill the application and does not call back the onDestroy method, then start UIAbility.
   *
   * @param { Want } want - Indicates the want name of the current app, and the ability name is UIAbility.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000050 - Internal error.
   * @throws { BusinessError } 16000053 - The ability is not on the top of the UI.
   * @throws { BusinessError } 16000063 - The target to restart does not belong to the current application or is not a UIAbility.
   * @throws { BusinessError } 16000064 - Restart too frequently. Try again at least 3s later.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 12
   */
  restartApp(want: Want): void;

  /**
   * Preload UIExtensionAbility.
   *
   * @permission ohos.permission.PRELOAD_UI_EXTENSION_ABILITY
   * @param { Want } want - Indicates the want of target UIExtensionAbility.
   * @returns { Promise<void> } The promise returned by the function.
   * @throws { BusinessError } 201 - The application does not have permission to call the interface.
   * @throws { BusinessError } 202 - The application is not system-app, can not use system-api.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000001 - The specified ability does not exist.
   * @throws { BusinessError } 16000002 - Incorrect ability type.
   * @throws { BusinessError } 16000004 - Failed to start the invisible ability.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @systemapi
   * @stagemodelonly
   * @since 12
   */
  preloadUIExtensionAbility(want: Want): Promise<void>;

  /**
   * Set the state about whether the application supports process cache or not.
   *
   * @param { boolean } isSupported - Indicates the process cache support state.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 801 - Capability not supported.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 12
   */
  setSupportedProcessCache(isSupported : boolean): void;

  /**
   * Set font of the application
   *
   * @param { string } font - Font.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 12
   */
  setFont(font: string): void;

  /**
   * Get current app clone index.
   *
   * @returns { number } Returns the app clone index for current app.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000071 - The MultiAppMode is not {@link APP_CLONE}.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 12
   */
  getCurrentAppCloneIndex(): number;

  /**
   * Set font size scale.
   * @param {number} fontSizeScale - Font size scale.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @atomicservice
   * @since 13
   */
  setFontSizeScale(fontSizeScale: number): void;

  /**
   * Get current app key of current running app instance.
   *
   * @returns { string } Returns the key of current running app instance.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000078 - The multi-instance is not supported.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 14
   */
  getCurrentInstanceKey(): string;

  /**
   * Get all running app instance key for current bundle
   *
   * @returns { Promise<Array<string>> } Returns the array of all running app instance keys.
   * @throws { BusinessError } 16000011 - The context does not exist.
   * @throws { BusinessError } 16000050 - Internal error.
   * @throws { BusinessError } 16000078 - The multi-instance is not supported.
   * @syscap SystemCapability.Ability.AbilityRuntime.Core
   * @stagemodelonly
   * @since 14
   */
    getAllRunningInstanceKeys(): Promise<Array<string>>;
}