BeanDesc bd = BeanDescFactory.getBeanDesc(Hoge.class);
        PropertyDesc pd = bd.getPropertyDesc("foo");
        assertThat(pd.isParameterized(), is(true));
        assertThat(pd.getElementClassOfCollection(), is(sameClass(String.class)));

        ParameterizedClassDesc pcd = pd.getParameterizedClassDesc();
        assertThat(pcd.getRawClass(), is(sameClass(List.class)));

    }

    @Override
    public ParameterizedClassDesc getParameterizedClassDesc() {
        return parameterizedClassDesc;
    }

    @Override
    public Class<?> getElementClassOfCollection() {
        if (!Collection.class.isAssignableFrom(propertyType) || !isParameterized()) {
            return null;
        }
        final ParameterizedClassDesc pcd = parameterizedClassDesc.getArguments()[0];