import type { IDumiUnifiedTransformer } from '..';
import type { IPreviewerTransformer } from './builtin';
export declare const previewerTransforms: IPreviewerTransformer[];
export type { IPreviewerTransformer };
/**
 * register custom previewer transformer
 * @note    will be execute before builtin transformer
 * @param t transformer
 */
export declare function registerPreviewerTransformer(t: IPreviewerTransformer): void;
export default function previewer(): IDumiUnifiedTransformer;