import java.io.Serializable;
import java.util.Calendar;
import java.util.Date;

/**
 * Information regarding when and why a daemon was stopped.
 */
public class DaemonStopEvent implements Serializable {
    public static final org.gradle.internal.serialize.Serializer<DaemonStopEvent> SERIALIZER = new Serializer();

    private final Date timestamp;
    @Nullable
    private final Long pid;
    @Nullable

        status.pid == null
    }

    def "PID unboxing should not happen in DaemonStopEvent"() {
        given:
        Long unknownPID = null;

        when:
        def daemonStopEvent = new DaemonStopEvent(null, unknownPID, null, null);

        then:
        notThrown(NullPointerException)
        daemonStopEvent.pid == null
    }

    void store(DaemonInfo info);
    void remove(Address address);
    void markState(Address address, State state);

    void storeStopEvent(DaemonStopEvent stopEvent);
    List<DaemonStopEvent> getStopEvents();
    void removeStopEvents(Collection<DaemonStopEvent> stopEvents);

    static class EmptyRegistryException extends RuntimeException {
        public EmptyRegistryException(String message) {
            super(message);

    }

    def "clears multiple stop events when non-empty"() {
        given:
        def stopEvents = [
            new DaemonStopEvent(new Date(1L), new Random().nextLong(), DaemonExpirationStatus.GRACEFUL_EXPIRE, "STOP_REASON"),
            new DaemonStopEvent(new Date(42L), new Random().nextLong(), DaemonExpirationStatus.IMMEDIATE_EXPIRE, "ANOTHER_STOP_REASON")
        ]

        }
    }

    @Override
    public List<DaemonStopEvent> getStopEvents() {
        lock.lock();
        try {
            LOGGER.debug("Getting daemon stop events");
            DaemonRegistryContent content = cache.get();
            if (content == null) { // no daemon process has started yet
                return new LinkedList<DaemonStopEvent>();
            }
            return content.getStopEvents();

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