/// <reference types="node" />
import * as fs from 'fs';
import nodeResolve from 'resolve';
export declare class Helpers {
    private static _upwardPathSegmentRegex;
    static nodeResolveAsync(id: string, opts: nodeResolve.AsyncOpts): Promise<string>;
    static fsExistsAsync(filesystemPath: fs.PathLike): Promise<boolean>;
    static isDownwardRelative(inputPath: string): boolean;
}
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