private final List<FileSystemLocationSnapshot> removedSnapshots = new ArrayList<>();
    private final List<FileSystemLocationSnapshot> addedSnapshots = new ArrayList<>();

    public void publishSnapshotDiff(SnapshotHierarchy.SnapshotDiffListener snapshotDiffListener) {
        if (!removedSnapshots.isEmpty() || !addedSnapshots.isEmpty()) {
            snapshotDiffListener.changed(removedSnapshots, addedSnapshots);
        }

            SnapshotCollectingDiffListener diffListener = new SnapshotCollectingDiffListener();
            SnapshotHierarchy invalidatedRoot = currentRoot.invalidate(location, diffListener);
            diffListener.publishSnapshotDiff((removedSnapshots, addedSnapshots) -> virtualFileSystemContentsChanged(removedSnapshots, addedSnapshots, invalidatedRoot));
            return invalidatedRoot;
        };
    }

    @Override

            SnapshotHierarchy newRoot = updateFunction.update(diffListener);
            return withWatcherChangeErrorHandling(newRoot, () -> diffListener.publishSnapshotDiff((removedSnapshots, addedSnapshots) ->
                watchRegistry.virtualFileSystemContentsChanged(removedSnapshots, addedSnapshots, newRoot)
            ));
        }
    }

    @Override

            def diffListener = new SnapshotCollectingDiffListener()
            def newRoot = updateFunction.update(diffListener)
            diffListener.publishSnapshotDiff { removed, added ->
                updater.virtualFileSystemContentsChanged(removed, added, newRoot)
            }
            return newRoot
        }
    }

    List<File> movedPaths = []