code: def test_faster_rcnn_fpn_backbones_small(
      model_name, param_groups_len
  ):
      backbone_fn = getattr(
          models.torchvision.faster_rcnn.backbones, model_name
      )
      backbone = backbone_fn(pretrained=False)
  
      model = faster_rcnn.model(num_classes=4, backbone=backbone)
      assert len(model.param_groups()) == param_groups_len
  
imports: import pytest
  from icevision.all import *
  from icevision.models.torchvision import faster_rcnn
label_desc: Use image node_id 3 for calling a global function with example usage: test_faster_rcnn_fpn_backbones_small(model_name, param_groups_len) without return types