code: @TargetApi(18)
      public void stopRangingBeaconsInRegion(@NonNull Region region) throws RemoteException {
          if (!isBleAvailableOrSimulated()) {
              LogManager.w(TAG, "Method invocation will be ignored.");
              return;
          }
          if (determineIfCalledFromSeparateScannerProcess()) {
              return;
          }
          synchronized (rangedRegions) {
              Region regionToRemove = null;
              for (Region rangedRegion : rangedRegions) {
                  if (region.getUniqueId().equals(rangedRegion.getUniqueId())) {
                      regionToRemove = rangedRegion;
                  }
              }
              rangedRegions.remove(regionToRemove);
          }
          applyChangesToServices(BeaconService.MSG_STOP_RANGING, region);
      }
docs: Tells the <code>BeaconService</code> to stop looking for beacons that match the passed
  <code>Region</code> object and providing mDistance information for them.
  
  @param region
  @see #setMonitorNotifier(MonitorNotifier notifier)
  @see #startMonitoringBeaconsInRegion(Region region)
  @see MonitorNotifier
  @see Region