Pending merging of https://github.com/angular/ts2dart/pull/232 `XHRConnection` private var `_xhr` should be typed as such: https://github.com/angular/angular/blob/b3d98cba771c2bd57c2f061f990be16417037f55/modules/angular2/src/http/backends/xhr_backend.ts#L27
Pending merging of dart-archive/ts2dart#232
XHRConnectionprivate var_xhrshould be typed as such:angular/modules/angular2/src/http/backends/xhr_backend.ts
Line 27 in b3d98cb