import VoiceStep, { CallStartEvent, TODO } from './voice';
import { IEvent } from '@onereach/flow-sdk/dst/types/event';
export default class WaitForCall extends VoiceStep<TODO, TODO, TODO> {
    get conversation(): string | import("@onereach/flow-sdk/types").IMergeField;
    runStep(): Promise<void>;
    onCall(event: IEvent<CallStartEvent>): Promise<any>;
}