code: def nhwc2nchw(g: jit_utils.GraphContext, input):
      axes = [0, 3, 1, 2]
      return _permute_helper(g, input, axes)
  
imports: import importlib
  import inspect
  from torch.onnx import symbolic_helper, symbolic_opset9
  from torch.onnx._internal import jit_utils, registration
label_desc: Use image node_id 4 for calling a global function with example usage: nhwc2nchw(g, input) and returns: _permute_helper