import { Feed } from '../../../feed';
import { ActivityResponse } from '../../../gen/models';
import { EventPayload, UpdateStateResult } from '../../../types-internal';
export declare const addActivitiesToState: (newActivities: ActivityResponse[], activities: ActivityResponse[] | undefined, position: "start" | "end") => UpdateStateResult<{
    activities: ActivityResponse[];
}>;
export declare function handleActivityAdded(this: Feed, event: EventPayload<'feeds.activity.added'>): void;
