code: def unflatten_master_params(model_params, master_params):
      """
      Unflatten the master parameters to look like model_params.
      """
      return _unflatten_dense_tensors(
          master_params[0].detach(), model_params
      )
  
file_path: improved-diffusion/improved_diffusion/fp16_util.py
imports: import torch.nn
  from torch._utils import _flatten_dense_tensors, _unflatten_dense_tensors
label_desc: Use image node_id 6 for calling a global function with example usage: unflatten_master_params(model_params, master_params) and returns: _unflatten_dense_tensors