code: public void addSource(VehicleDataSource source) {
          Log.i(TAG, "Adding data source " + source);
          mUserOriginPipeline.addSource(source);
      }
docs: Add a new data source to the vehicle service.
  
  For example, to use the trace data source to playback a trace file, call
  the addSource method after binding with VehicleManager:
  
  service.addSource(new TraceVehicleDataSource(
  new URI("/sdcard/openxc/trace.json"))));
  
  @param source an instance of a VehicleDataSource