code: def test_naming_conventions(model_fn):
      weights_enum = get_model_weights(model_fn)
      assert weights_enum is not None
      assert len(weights_enum) == 0 or hasattr(weights_enum, "DEFAULT")
  
imports: import copy
  import os
  import pickle
  import pytest
  import test_models
  import torch
  from common_extended_utils import get_file_size_mb, get_ops
  from torchvision import models
  from torchvision.models import get_model_weights, Weights, WeightsEnum
  from torchvision.models._utils import handle_legacy_interface
  from torchvision.models.detection.backbone_utils import mobilenet_backbone, resnet_fpn_backbone
label_desc: Use image node_id 10 for calling a global function with example usage: test_naming_conventions(model_fn) without return types