@Test
  void encodeLogicSupportsByteArray() throws Exception {
    byte[] expectedRequest = {12, 34, 56};
    server.enqueue(new MockResponse());

    OtherTestInterface api =
        AsyncFeign.builder()
            .target(OtherTestInterface.class, "http://localhost:" + server.getPort());

    api.binaryRequestBody(expectedRequest);

    assertThat(server.takeRequest()).hasBody(expectedRequest);
  }
The type of a parameter value may not be the desired type to encode as. Prefer the interface
type.
core/src/test/java/feign/FeignUnderAsyncTest.java