import { Observable } from 'rxjs';
import { Ref } from '../ref';
import { NgtComponentStore } from '../stores/component-store';
import type { NgtInstanceInternal, NgtState, NgtUnknownInstance, UnknownRecord } from '../types';
export declare function getInstanceInternal<T extends object = UnknownRecord>(obj: T | undefined): NgtInstanceInternal | undefined;
export declare function prepare<TInstance extends object = UnknownRecord>(instance: TInstance, root: () => NgtState, parentInstance?: Ref, previousInstance?: Ref, isPrimitive?: boolean): NgtUnknownInstance<TInstance>;
export declare function optionsFieldsToOptions(instance: NgtComponentStore, fields: Record<string, boolean>, keepPrevious?: boolean): Observable<UnknownRecord>;
export declare function checkUpdate(value: unknown): void;