Kestutis
Right now I can not pass FormData if I'm using jsonPlus middleware. All my responses comes as json, so I need to pass Accept header as json as well as parse response. If I have FormData(want to upload file), I don't need Content-Type: application/json header. fetch-plus-json doesn't handle this case. Workaround I'm using: ```javascript client.addMiddleware((request) => { if (request.options.body instanceof FormData) { request.options.headers["Accept"] = "application/json"; return plusJson.handler(); } else { return plusJson()(request); } }); ```