import { SingleSubject } from '../types/signal';
import { BalMutationObserver, MutationObserverOptions } from './mutation.interfaces';
export declare class BalMutationSubject extends SingleSubject<BalMutationObserver> {
    private options;
    private listener?;
    private debouncedNotify;
    constructor(options: Partial<MutationObserverOptions>);
    attach(observer: BalMutationObserver): void;
    detach(): void;
}