Method m = Baz.class.getMethod("rawMap", Map.class);
        assertThat(MethodUtil.getValueTypeOfMapFromReturnType(m), is(nullValue()));

        m = Baz.class.getMethod("genericMap", Map.class);
        assertThat(MethodUtil.getValueTypeOfMapFromReturnType(m), is(sameClass(Class.class)));
    }

    /**
     *
     */
    public interface Baz {

        /**

     *
     * @param method
     *            The method. Cannot be {@literal null}
     * @return The value type of the parameterized map
     */
    public static Class<?> getValueTypeOfMapFromReturnType(final Method method) {
        assertArgumentNotNull("method", method);

        final Type returnType = method.getGenericReturnType();