code: public boolean isActive(VehicleDataSource skipSource) {
          boolean connected = false;
          for(VehicleDataSource s : mSources) {
              if(s != skipSource) {
                  connected = connected || s.isConnected();
              }
          }
          return connected;
      }
docs: Return true if at least one source is active.
  
  @param skipSource don't consider this data source when determining if the
  pipeline is active.