default Map<K, Throwable> handleUnsupportedVersionException(
        int brokerId,
        UnsupportedVersionException exception,
        Set<K> keys
    ) {
        return keys.stream().collect(Collectors.toMap(k -> k, k -> exception));
    }
Callback that is invoked when a fulfillment request hits an UnsupportedVersionException.
Keys for which the exception cannot be handled and the request shouldn't be retried must be mapped
to an error and returned. The request will then be retried for the remainder of the keys.

@return The failure mappings for the keys for which the exception cannot be handled and the
request shouldn't be retried. If the exception cannot be handled all initial keys will be in
the returned map.
clients/src/main/java/org/apache/kafka/clients/admin/internals/AdminApiHandler.java