import { Observable } from 'rxjs';
import { SuspenseInput } from '../models/suspense';
export declare class SuspenseValue<T = any> {
    value?: T;
    booleanValue: boolean;
    private source?;
    private valueSubscription?;
    private changeSubject;
    get valueChanges(): Observable<void>;
    init(source: SuspenseInput<T>): Promise<any>;
    unsubscribe(): void;
    private toBoolean;
}