message: Small comment on a confusing debug gizmo
diff: @@ -61,6 +61,10 @@ tf::Status NGraphClusterPass::Run(const tf::GraphOptimizationPassOptions& option
  // TODO(amprocte): do we need to look at job name, replica, task?
  bool NGraphClusterPass::IsNGraphNode(const tf::Node* node) {
  + //
  + // This is just a debugging aid to experiment with clustering without
  + // actually mapping things to nGraph. It will probably go away soon.
  + //
  if (std::getenv("NGRAPH_TF_CLUSTER_BY_OP_NAME") != nullptr) {
  if (tf::str_util::StartsWith(node->name(), "accuracy/")) {
  return false;
  