import { MixinApiService } from '../..';
declare class RelationCache {
    private instance;
    private cachedFriendIDs;
    constructor(instance: MixinApiService);
    clear: () => void;
    getFullFriendsIDs: (operationID: string) => Promise<string[]>;
    isFriend: (id: string) => boolean;
    addNewFriend: (id: string) => void;
    deleteFriend: (id: string) => void;
}
export default RelationCache;