@Test
  void formParamsDoesNotSetBodyType() throws Exception {
    final MethodMetadata md =
        parseAndValidateMetadata(
            FormParams.class, "login", String.class, String.class, String.class);

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