    @Test
    public void handleBody__nested() throws Exception {

        NestedType nestedType = NestedType.newBuilder().setF1("abc").build();
        TestRequest expected = TestRequest.newBuilder().setNt(nestedType).build();

        // Output nested json only
        String json = JsonFormat.printer().print(nestedType);

        TestRequest.Builder deserialized = TestRequest.newBuilder();
        RequestParser.handleBody("nt", deserialized, json);
        assertThat(deserialized.build()).isEqualTo(expected);
    }