code: def denormalize(self, x):
      return x * self.std + self.mean
  
file_path: dgl/examples/pytorch/dtgrnn/utils.py
imports: import dgl
  import numpy
  import scipy.sparse
  import torch
  import torch.nn
label_desc: Use image node_id 3 for calling the NormalizationLayer obj's underlying member method code with example usage: obj.denormalize(x) and returns: unknown