adding todo

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/BigtableChannelPrimer.java

@@ -97,6 +97,8 @@ private void sendPrimeRequests(ManagedChannel managedChannel) throws IOException
       try {
         stub.pingAndWarmCallable().call(request);
       } catch (Throwable e) {
+        // TODO: Not sure if we should swallow the error here. We are pre-emptively swapping channels if the new
+        // channel is bad.
         if (e instanceof ExecutionException) {
           e = e.getCause();
         }