How to use the @angular-devkit/build-angular.executeKarmaBuilder function in @angular-devkit/build-angular

export function buildElectronKarma(options: any, context: BuilderContext): Observable {
  return executeKarmaBuilder(options, context, {
    webpackConfiguration: (config) => {
      return { ...config, target: 'electron-renderer' };
    }
  });
}

export function buildCustomWebpackKarma(
  options: CustomWebpackKarmaBuildSchema,
  context: BuilderContext
): Observable {
  return executeKarmaBuilder(options, context, {
    webpackConfiguration: customWebpackConfigTransformFactory(options, context),
  });
}