private boolean supportsNoAuth(ServiceIndex index, ToShapeId service, ToShapeId operation) {
        return index.getEffectiveAuthSchemes(service, operation, AuthSchemeMode.NO_AUTH_AWARE)
                .containsKey(NoAuthTrait.ID);
    }
Adds a priority list of supported auth schemes for operations with optional auth or
operations which don't support all of a service's auth schemes.
smithy-docgen/src/main/java/software/amazon/smithy/docgen/interceptors/OperationAuthInterceptor.java