visionmedia/superagent — pull request #328 by lsdriscoll (2014-02-27 10:01:11+00:00)
Title: added API to set xhr object from host

Allows the developer to provide a custom XHR object for use within superagent

Example use case is using superagent inside Titanium (with node-titaniumifier) which provides it's own XHR object.