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 {

        /**