import { DestroyRef, Injector, WritableSignal } from '@angular/core';
import { Observable } from 'rxjs';
export declare class State<T> {
    defaults: T;
    injector: Injector;
    _destroyRef: DestroyRef;
    state: WritableSignal<T>;
    state$: Observable<T>;
    subscribe: typeof this.state$.subscribe;
    pipe: typeof this.state$.pipe;
    private subscriptions;
    constructor(defaults: T, injector?: Injector);
    get snapshot(): T;
    /**
     * @deprecated The method should not be used
     */
    asObservable(): Observable<T>;
    set(state: T): void;
    patch(patch: Partial<T>): void;
    reset(): void;
    connect(source: Observable<T>): this;
    flush(): void;
    /**
     * @deprecated The method should not be used
     */
    sync<T extends State<any>>(state: T): this;
    select<K extends keyof T>(key: K): State<T[K]>;
    pick<K extends keyof T>(...keys: K[]): State<Pick<T, K>>;
    connectTo<K extends keyof T>(key: K, source: Observable<T[K]>): this;
}