code: def test_hard_sigmoid_grad():
      for _ in range(100):
          _run_act_layer_grad("hard_sigmoid", inplace=None)
  
file_path: pytorch-image-models/tests/test_layers.py
imports: import torch
  import torch.nn
  from timm.layers import create_act_layer, set_layer_config
  import importlib
  import os
label_desc: Use image node_id 4 for calling a global function with example usage: test_hard_sigmoid_grad() without return types