public static FileWatcher newWatcher(Path... paths) {
    var watcher = new FileWatcher();
    for (var path : paths) {
      watcher.watch(path);
    }
    return watcher;
  }
Returns a new file watcher watching a set of files for modifications.
planetiler-core/src/main/java/com/onthegomap/planetiler/util/FileWatcher.java