docs: function ReadBuffer (options, buffer) {
    if (!(this instanceof ReadBuffer)) {
      return new ReadBuffer(options, buffer)
    }
  
    if (typeof options === 'string' || options instanceof Buffer) {
      buffer = options
      options = {}
    }
  
    options = Object.assign({}, options)
    Readable.call(this, options)
  
    this.buffer = (typeof buffer === 'string' ? Buffer.from(buffer) : buffer)
  
    return this
  }