It's possible to create a request and configure query parameters:

let request = RestRequest(url: "http://localhost:8090/api/races")
request.queryItems = [
    URLQueryItem(name: "first", value: "0"),
    URLQueryItem(name: "size", value: "10")
]

but then when you call request.responseObject { ... }, the query parameters get removed, because of this line:

https://github.com/IBM-Swift/SwiftyRequest/blob/2bf11cdf775da7c39a8658100a8c66f12d759109/Sources/SwiftyRequest/RestRequest.swift#L375

This is really confusing, as I didn't even notice responseObject had a queryItems parameter, with a default value of nil.

I assume this is a bug and the method's parameter shouldn't overwrite the queryItems property when that parameter is nil?