code: function Api(options, t, u, j) {
  	  this.options = options;
  	  this.transport = t;
  	  this.url = u;
  	  this.jsonBackup = j;
  	  this.accessToken = options.accessToken;
  	  this.transportOptions = _getTransport(options, u);
  	}
docs: Api is an object that encapsulates methods of communicating with
  the Rollbar API.  It is a standard interface with some parts implemented
  differently for server or browser contexts.  It is an object that should
  be instantiated when used so it can contain non-global options that may
  be different for another instance of RollbarApi.
  
  @param options {
  accessToken: the accessToken to use for posting items to rollbar
  endpoint: an alternative endpoint to send errors to
  must be a valid, fully qualified URL.
  The default is: https://api.rollbar.com/api/1/item
  proxy: if you wish to proxy requests provide an object
  with the following keys:
  host or hostname (required): foo.example.com
  port (optional): 123
  protocol (optional): https
  }