import { BehaviorSubject, Observer, Subscription } from 'rxjs';
export declare class BehaviorSubjectExt<T> extends BehaviorSubject<T> {
    subscriptions: Subscription[];
    clearSubscriptions(): void;
    clearClosed(): void;
    subscribe(observerOrNext?: Partial<Observer<T>> | ((value: T) => void) | null, error?: ((error: any) => void) | null, complete?: (() => void) | null): Subscription;
    unsubscribe(): void;
}