import { ServerPlugin } from '.';
import { ExistingRawSourceMap } from 'rollup';
import { RawSourceMap } from 'source-map';
export declare type SourceMap = ExistingRawSourceMap | RawSourceMap;
export declare function mergeSourceMap(oldMap: SourceMap | null | undefined, newMap: SourceMap): SourceMap;
export declare const sourceMapPlugin: ServerPlugin;