private final URLClassLoader commonParent;
    private final GuavaBackedClassLoaderCache<Set<TimestampedFile>> cache;

    static class TimestampedFile {
        private final File file;
        private final long timestamp;

        public TimestampedFile(File file) {
            this.file = file;
            this.timestamp = IO.getModifiedTimeOrZero(file);
        }

        @Override

Class <org.gradle.api.internal.tasks.scala.TimeCheckingClassLoaderCache$TimestampedFile> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (TimeCheckingClassLoaderCache.java:0)