export class Guid {
  private static s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
      .toString(16)
      .substring(1);
  }

  private static guid() {
    return this.s4() + this.s4() + '-' + this.s4() + '-' + this.s4() + '-' +
      this.s4() + '-' + this.s4() + this.s4() + this.s4();
  }

  static random() {
    return Guid.guid();
  }
}