continue;
      }
      if (mlir::TF::CanBeRefined(use.get().getType())) return true;
    }
  }
  return false;
}

bool HasDynamicExternalValues(Operation* op) {
  return op
      ->walk([](Operation* walked_op) {
        for (Value v : walked_op->getOperands()) {
          if (mlir::TF::CanBeRefined(v.getType())) {
            return WalkResult::interrupt();
          }