private final Serializer<StartParameterInternal> startParameterSerializer = new StartParameterSerializer();
        private final Serializer<SerializedPayload> payloadSerializer = new SerializedPayloadSerializer();
        private final Serializer<BuildEventSubscriptions> buildEventSubscriptionsSerializer = new BuildEventSubscriptionsSerializer();

        @Override

import org.gradle.tooling.internal.provider.serialization.DefaultPayloadClassLoaderRegistry;
import org.gradle.tooling.internal.provider.serialization.ModelClassLoaderFactory;
import org.gradle.tooling.internal.provider.serialization.PayloadSerializer;
import org.gradle.tooling.internal.provider.serialization.WellKnownClassLoaderRegistry;

/**
 * Shared services for a tooling API provider connection.
 */

                    }
                    if (result.getFailure() != null) {
                        PayloadSerializer payloadSerializer = new PayloadSerializer(new TestClassLoaderRegistry());
                        return new BuildResult(null, (RuntimeException) payloadSerializer.deserialize(result.getFailure()));
                    }
                    return new BuildResult(null, null);
                } finally {

Class <org.gradle.tooling.internal.provider.serialization.PayloadSerializer> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (PayloadSerializer.java:0)