docs: function RandomStream(options) {
    if (!(this instanceof RandomStream)) {
      return new RandomStream(options);
    }
  
    this._options = merge(Object.create(RandomStream.DEFAULTS), options);
  
    assert(typeof this._options.length === 'number', 'Invalid length supplied');
    assert(typeof this._options.size === 'number', 'Invalid size supplied');
    assert(typeof this._options.hash === 'string', 'Invalid hash alg supplied');
  
    this.hash = crypto.createHash(this._options.hash);
    this.bytes = 0;
  
    ReadableStream.call(this);
  }