@Override
    public String toString() {
        String bodyStr = (body == null || body.length == 0) ? "[empty]" : "[omitted]";
        return "Response, headers: " + headers + ", body: " + bodyStr;
    }
Returns a mutable multi-map of headers for this Response.

@return a mutable multi-map of headers for this Response
application/src/main/java/com/yahoo/application/container/handler/Response.java