restygwt/src/main/java/org/fusesource/restygwt/client/callback/DefaultCallbackFactory.java
@Override
    public FilterawareRequestCallback createCallback(Method method) {
        FilterawareRequestCallback callback = new DefaultFilterawareRequestCallback(method);

        for (CallbackFilter filter : callbackFilters) {
            callback.addFilter(filter);
        }
        return callback;
    }
@Override
    public FilterawareRequestCallback createCallback(Method method) {
        FilterawareRequestCallback callback = new DefaultFilterawareRequestCallback(method);

        for (CallbackFilter filter : callbackFilters) {
            callback.addFilter(filter);
        }
        return callback;
    }
helper method to create the callback with all configurations wanted

@param method
@return