import type { AgStudioApi, StudioApiInternals } from '../api/agStudioApi';
import type { AgBaseRegistry } from '../api/agRegistry';
export declare const INTERNAL: unique symbol;
export type WithInternal<TPublic, TInternal> = TPublic & {
    readonly [INTERNAL]: TInternal;
};
export declare function getInternals<TInternal>(obj: object): TInternal;
export declare function getApiInternals<TRegistry extends AgBaseRegistry>(api: AgStudioApi<TRegistry>): StudioApiInternals;
export declare function addInternals<TPublic, TInternal>(obj: TPublic, internals: TInternal): WithInternal<TPublic, TInternal>;