import static org.gradle.internal.resource.transport.sftp.SftpClientFactory.SftpClientCreator

class SftpClientFactoryTest extends ConcurrentSpec {
    SftpClientFactory sftpClientFactory = new SftpClientFactory()
    SftpClientCreator sftpClientCreator = Mock(SftpClientCreator)

    def setup() {
        sftpClientFactory.sftpClientCreator = sftpClientCreator
    }

    def "Can acquire and release single client"() {

@ThreadSafe
@ServiceScope(Scope.Global.class)
public class SftpClientFactory implements Stoppable {
    private static final Logger LOGGER = LoggerFactory.getLogger(SftpClientFactory.class);

    private SftpClientCreator sftpClientCreator = new SftpClientCreator();
    private final Object lock = new Object();
    private final List<LockableSftpClient> allClients = new ArrayList<>();

Class <org.gradle.internal.resource.transport.sftp.SftpClientFactory$SftpClientCreator$1> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (SftpClientFactory.java:0)
Class <org.gradle.internal.resource.transport.sftp.SftpClientFactory$SftpClientCreator$2> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (SftpClientFactory.java:0)