import { InvokeResponse } from '@microsoft/teams.api';
import { App } from './app';
import { IActivityEvent } from './events';
import { IPlugin } from './types';
/**
 * activity handler called when an inbound activity is received
 * @param event the received activity event
 */
export declare function $process<TPlugin extends IPlugin>(this: App<TPlugin>, event: IActivityEvent): Promise<InvokeResponse>;