import { Observable, ReplaySubject } from "rxjs";
import { OnChanges, SimpleChanges } from "@angular/core";
/**
 *  @publicApi
 *  @description
 *  Creates a stream on {@link OnChanges} of a component.
 *
 * @param component
 * @param input
 */
export declare function useOnChanges$<I extends Record<string, any>, C extends OnChanges, K extends keyof C>(component: C, ...input: Array<K>): Observable<Partial<I>>;
/**
 * @internal
 * @param originalNgOnChanges
 */
export declare function validate(originalNgOnChanges: (changes: SimpleChanges) => void): void;
/**
 * @internal
 * @param component
 */
export declare function decorate<I extends Record<string, any>, C extends OnChanges>(component: C): {
    stream$: ReplaySubject<Partial<I>>;
};
/**
 * @internal
 * @param value
 */
export declare function isNotUndefined<T>(value: T | undefined): value is T;