private SaslHandshakeResponse createSaslHandshakeResponse() {
        return new SaslHandshakeResponse(
                new SaslHandshakeResponseData()
                    .setErrorCode(Errors.NONE.code()).setMechanisms(singletonList("GSSAPI")));
    }
Check that all error codes in the response get included in {@link AbstractResponse#errorCounts()}.
clients/src/test/java/org/apache/kafka/common/requests/RequestResponseTest.java