code: function Message(options, body) {
    Stream.call(this);
  
    if (options || body)
      this.bind(options, body);
  
  }
docs: @module zotero 
  A Zotero API message contains an API response and
  the corresponding request object.
  
  @class Message
  @constructor
  @extends Stream
  
  @params {Object} [options] For `https.request`.
  @params {Object} [body] Optional request body.