@Test
  void queryMapMapSubclass() throws Exception {
    final MethodMetadata md =
        parseAndValidateMetadata(
            QueryMapTestInterface.class, "queryMapMapSubclass", SortedMap.class);

    assertThat(md.queryMapIndex()).isEqualTo(0);
  }
Body type is only for the body param.
core/src/test/java/feign/DefaultContractTest.java