code: function qinu (options, args) {
    const { dict, length, template, args: optArgs, random } =
      this instanceof Qinu ? options : normalizeOptions(options)
    if (!(args instanceof Array)) {
      args = Array.prototype.slice.call(arguments, 1)
    }
    if (optArgs instanceof Array) {
      args = optArgs.concat(args)
    }
  
    const key = !random && this instanceof Qinu
      ? this.next(dict, length) : generateKey(dict, length)
    return applyTemplate(template, key, args)
  }
docs: Not an arrow function, cause it requires context