import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

import static org.gradle.security.internal.SecuritySupport.toLongIdHexString;

public class CrossBuildCachingKeyService implements PublicKeyService, Closeable {
    final static long MISSING_KEY_TIMEOUT = TimeUnit.MILLISECONDS.convert(24, TimeUnit.HOURS);

    private final PersistentCache cache;

        if (useKeyServers) {
            PublicKeyDownloadService keyDownloadService = new PublicKeyDownloadService(ImmutableList.copyOf(keyServers), repository);
            keyService = new CrossBuildCachingKeyService(globalScopedCacheBuilderFactory, decoratorFactory, buildOperationRunner, keyDownloadService, timeProvider, refreshKeys);
        } else {
            keyService = EmptyPublicKeyService.getInstance();
        }

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import static org.gradle.api.internal.artifacts.verification.signatures.CrossBuildCachingKeyService.MISSING_KEY_TIMEOUT;

public class CrossBuildSignatureVerificationService implements SignatureVerificationService {
    private final SignatureVerificationService delegate;
    private final FileHasher fileHasher;

Class <org.gradle.api.internal.artifacts.verification.signatures.CrossBuildCachingKeyService$CacheEntry> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (CrossBuildCachingKeyService.java:0)