code: def __repr__(self):
      return self.bn.__repr__()
  
file_path: torch-points3d/torch_points3d/modules/SparseConv3d/nn/torchsparse.py
imports: import torch
  import torchsparse
  import torchsparse.nn
label_desc: Use image node_id 3 for calling the BatchNorm obj's underlying member method code with example usage: obj.__repr__() and returns: self