code: public ServiceRegistration<FileMonitor> monitorFiles(Collection<String> paths, long monitorInterval) {
          BundleContext bundleContext = actionable.getBundleContext();
          final Hashtable<String, Object> fileMonitorProps = new Hashtable<String, Object>();
          fileMonitorProps.put(FileMonitor.MONITOR_FILES, paths);
          fileMonitorProps.put(FileMonitor.MONITOR_INTERVAL, monitorInterval);
          return bundleContext.registerService(FileMonitor.class, this, fileMonitorProps);
      }
docs: Registers this file monitor to start monitoring the specified files at the specified interval.
  
  @param paths the paths of the files to monitor.
  @param monitorInterval the rate to monitor the files.
  
  @return the <code>FileMonitor</code> service registration.