import { Optional } from 'ts-data-forge';
import { type MutableSet } from 'ts-type-forge';
import { type ChildObservable, type ObservableId, type RootObservable } from '../types/index.mjs';
import { ObservableBaseClass } from './observable-base-class.mjs';
export declare class RootObservableClass<A> extends ObservableBaseClass<A, 'root', 0> implements RootObservable<A> {
    #private;
    protected readonly _descendantsIdSet: MutableSet<ObservableId>;
    constructor({ initialValue, }: Readonly<{
        initialValue: Optional<A>;
    }>);
    addDescendant<B>(child: ChildObservable<B>): void;
    startUpdate(nextValue: A): void;
}
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