code: def conv_layer(model):
      return model[0]
  
imports: import inspect
  import pytest
  from os import path
  import numpy
  import torchvision.models
  from flashtorch.activmax import GradientAscent
  from flashtorch.utils import apply_transforms
label_desc: Use image node_id 2 for calling a global function with example usage: conv_layer(model) and returns: model