@Rest(converters = { StringHttpMessageConverter.class, FormHttpMessageConverter.class })
public interface MyCoolRestInterface {
    @Post("/very/cool?foo={bar}")
    @SetsCookie({ "YUMMY" })
    @Accept(MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    String veryCool(MultiValueMap<String, String> params, boolean bar);

    @Get("needs/cookie")
    @RequiresCookie("YUMMY")
    String needsCookie();
}

@Override
public String veryCool(MultiValueMap<String, String> params, boolean bar) {
    ...
    String[] requestedCookies = new String[] {"YUMMY"};
    List<String> allCookies = response.getHeaders().get("Set-Cookie");
    *** RIGHT HERE *** > for (String rawCookie: allCookies) {
        ...
}