final Map<TypeVariable<?>, Type> map = GenericsUtil.getTypeVariableMap(Fuga.class);
        assertThat(map, is(notNullValue()));
        assertThat(map.isEmpty(), is(true));
        final Method m = Fuga.class.getMethod("getFuga");
        final Class<?> returnClass = GenericsUtil.getActualClass(m.getGenericReturnType(), map);
        assertThat(returnClass, is(sameClass(Object.class)));
    }

    /**
     * @throws Exception
     */

        public void setBaz(final Map<String, Date> date) {
        }

        /** */
        public List<?> hoge;

        /**
         * @return Set
         */
        public Set<? extends Enum<?>> getFuga() {
            return null;
        }

        /**
         * @param date
         */
        public void setHege(final Map<? extends String, ? extends Number> date) {
        }

    }

	req2.Header.Set("User-Agent", u.ua)
	return u.rt.RoundTrip(req2)
}

// WithUserAgent wraps an existing transport with custom User-Agent
func WithUserAgent(rt http.RoundTripper, getUA func() string) http.RoundTripper {
	return &uaTransport{
		ua: getUA(),
		rt: rt,
	}