}

        @Override
        public SnapshotVisitResult visitEntry(FileSystemLocationSnapshot snapshot) {
            if (shouldKeep.test(snapshot)) {
                return SnapshotVisitResult.CONTINUE;
            } else {
                root = invalidator.invalidate(snapshot.getAbsolutePath(), root);
                return SnapshotVisitResult.SKIP_SUBTREE;
            }
        }
    }

    /**
     * Called for each regular file/directory/missing/unavailable file.
     *
     * @return how to continue visiting the rest of the snapshot hierarchy.
     */
    SnapshotVisitResult visitEntry(FileSystemLocationSnapshot snapshot, RelativePathSupplier relativePath);

    /**
     * Called after all entries in the directory has been visited.
     */

import org.gradle.internal.snapshot.RelativePathTracker;
import org.gradle.internal.snapshot.RelativePathTrackingFileSystemSnapshotHierarchyVisitor;
import org.gradle.internal.snapshot.SnapshotVisitResult;

import javax.annotation.Nullable;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.HashSet;
import java.util.Map;

                    vfs.root.rootSnapshots().forEach { snapshot ->
                        snapshot.accept(new FileSystemSnapshotHierarchyVisitor() {
                            @Override
                            SnapshotVisitResult visitEntry(FileSystemLocationSnapshot fileSnapshot) {
                                if (fileSnapshot.type == FileType.RegularFile && fileSnapshot.absolutePath.startsWith(projectRoot)) {

    /**
     * Called for each regular file/directory/missing/unavailable file.
     *
     * @return how to continue visiting the rest of the snapshot hierarchy.
     */
    SnapshotVisitResult visitEntry(FileSystemLocationSnapshot snapshot);

    /**
     * Called after all entries in the directory has been visited.
     */
    default void leaveDirectory(DirectorySnapshot directorySnapshot) {}

import org.gradle.internal.snapshot.MissingFileSnapshot;
import org.gradle.internal.snapshot.RegularFileSnapshot;
import org.gradle.internal.snapshot.SnapshotHierarchy;
import org.gradle.internal.snapshot.SnapshotVisitResult;
import org.gradle.internal.vfs.FileSystemAccess;
import org.gradle.internal.vfs.impl.AbstractVirtualFileSystem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;

import org.gradle.internal.snapshot.FileSystemLocationSnapshot;
import org.gradle.internal.snapshot.FileSystemSnapshot;
import org.gradle.internal.snapshot.FileSystemSnapshotHierarchyVisitor;
import org.gradle.internal.snapshot.SnapshotVisitResult;
import org.gradle.internal.vfs.FileSystemAccess;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.CheckReturnValue;
import java.io.File;
import java.io.IOException;

import org.gradle.internal.snapshot.SnapshotHierarchy;
import org.gradle.internal.watch.registry.FileWatcherRegistry;
import org.gradle.internal.watch.vfs.FileSystemWatchingStatistics;

import static org.gradle.internal.snapshot.SnapshotVisitResult.CONTINUE;

public class DefaultFileSystemWatchingStatistics implements FileSystemWatchingStatistics {
    private final FileWatcherRegistry.FileWatchingStatistics fileWatchingStatistics;

import org.gradle.internal.snapshot.RelativePathTracker;
import org.gradle.internal.snapshot.RelativePathTrackingFileSystemSnapshotHierarchyVisitor;
import org.gradle.internal.snapshot.SnapshotVisitResult;

import javax.annotation.Nullable;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;