jupyterlab/packages/extension-builder/typings/webpack-config/webpack-config.d.ts

// Type definitions for webpack-config
// Project: https://github.com/mdreizin/webpack-config
// Definitions by: Steven Silvester <https://github.com/blink1073>

declare module 'webpack-config' {
  export class Config {
    merge(value: any): any;
  }
}