code: function createDebugFileRouter(adapterPool) {
      var router = express.Router();
  
      router.get('/:connectionId/:referenceId/*', function(req, res) {
          if (!adapterPool.has(req.params.connectionId)) {
              res.sendStatus(404);
              return;
          }
          var adapter = adapterPool.get(req.params.connectionId);
          adapter.sendRequest('source', { sourceReference: parseInt(req.params.referenceId, 10) }, TIMEOUT, function(response) {
              if (!response.success) {
                  res.sendStatus(404);
                  return;
              } else {
                  if (response.body.mimeType) {
                      res.setHeader('Content-Type', response.body.mimeType);
                  }
                  res.write(response.body.content);
                  res.end();
              }
          });
      });
  
      return router;
  }
docs: Create a router for debug file
  @param {Map.<string, DebugAdapter>} adapterPool
  @return {Express.Router}