/**
 * Register a global JSON body transformer for {@link response}. Use {@link serializeForHttp} from `@atlex/orm` when returning models from controllers.
 *
 * @param fn - Maps controller data to JSON-safe values before Express `res.json`.
 */
export declare function configureResponseSerializer(fn: (data: unknown) => unknown): void;
/**
 * @internal
 */
export declare function serializeJsonBody(data: unknown): unknown;
/**
 * @internal
 */
export declare function resetResponseSerializerForTests(): void;
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