code: def __init__(self, model_name, backbone_fn, **backbone_fn_kwargs):
      self.model_name = model_name
      self.backbone_fn = backbone_fn
      self.backbone_fn_kwargs = backbone_fn_kwargs
      self.backbone: nn.Module
  
imports: from icevision.imports import *
  from icevision.models.backbone_config import BackboneConfig
label_desc: Use image node_id 1 to create a new TorchvisionBackboneConfig object from inherited base classes: BackboneConfig with example: obj = TorchvisionBackboneConfig(model_name, backbone_fn)