code: def __init__(self, in_dim, out_dim):
      super().__init__()
      self.layer = nn.Linear(in_dim * 2, out_dim, bias=True)
  
file_path: dgl/examples/pytorch/gnn_explainer/models.py
imports: import dgl.function
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 1 to create a new Layer object from inherited base classes: nn with example: obj = Layer(in_dim, out_dim)