// Lifecycle messages
        registry.register(Build.class, new BuildSerializer(buildActionSerializer));
        registry.register(Cancel.class, new CancelSerializer());
        registry.register(DaemonUnavailable.class, new DaemonUnavailableSerializer());
        registry.register(BuildStarted.class, new BuildStartedSerializer());

Class <org.gradle.launcher.daemon.protocol.DaemonMessageSerializer$CancelSerializer> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DaemonMessageSerializer.java:0)