import { RawSourceMap } from "source-map";
declare type Times = {
    [name: string]: number;
};
export interface Options {
    sourcemap?: boolean;
    now?: () => number;
}
export declare function transform(input: string, opts?: Options): Promise<{
    code: string;
    sourcemap: RawSourceMap | undefined;
    performance: Times;
}>;
export {};