--- /dev/null
+package org.simantics.filesystem.services.sizetracker;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.31.0
+ */
+public interface DirectorySizeService {
+
+ SizeTracker track(Path directory) throws IOException;
+
+}