Method fail

lib/usage.ts:771–771

(msg?: string | null, err?: YError | string)

  epilog(msg: string): void;
  example(cmd: string, description?: string): void;
  fail(msg?: string | null, err?: YError | string): void;
  failFn(f: FailureFunction | boolean): void;
  freeze(): void;
  functionDescription(fn: {name?: string}): string;