code: function(service, credentials, accounts, keywords) {
    logger.info(service, 'Stream initializing...');
    
    this._service     = service;
    this._credentials = credentials;
    this._accounts    = accounts;
    this._keywords    = keywords;
    
      
    // Initialize responder
    this.responder = new Responder();
    
    
    /**
     * Emit posts with content
     */
    this.hose = new events.EventEmitter();
  }
docs: Service#Stream
  Manages the streaming connection to a social media service API.
  Parent abstract class, intended to be inherited.
  @constructor
  @param {Object} credentials The auth credentials for connecting to the social media API.
  @param {Array}  accounts    An array of accounts to track.
  @param {Array}  keywords    An array of keywords to track.