export interface Observable<T> {
    subscribe(subscriber: Subscriber<T>): Subscription;
}
export declare type PartialObservable<T> = {
    [K in keyof T]?: T[K] | Observable<T[K]>;
};
export interface Subscriber<T> {
    next(value: T): void;
    error(err: any): void;
    complete(): void;
}
export interface Subscription {
    unsubscribe: Function;
}
export interface Subject<T> extends Observable<T> {
    next(value: T): void;
}
export declare function isObs<T extends Observable<any>>(x: T | any): x is T;
export declare function isSubject<T extends Subject<any>>(x: T | any): x is T;
export declare function subscribe<T>(obs: Observable<T>, next: ((x: T) => void) | Subscriber<T>): Subscription;
export declare function unsubscribe(subscription: Subscription): any;