code: def optimizer_creator(model, config):
      optimizer = optim.SGD(
          model.parameters(), lr=config.get("lr", 0.001), momentum=0.9
      )
      return optimizer
  
file_path: BigDL/python/orca/tutorial/pytorch/FashionMNIST/model.py
imports: import torch.nn
  import torch.nn.functional
  import torch.optim
label_desc: Use image node_id 2 for calling a global function with example usage: optimizer_creator(model, config) and returns: optimizer