code: def forward(self, obj_idx):
      net = nn.Sequential(self.lookup_lin(obj_idx), self.norm_nl)
      return net
  
imports: import functools
  import torch
  import torch.nn
  from .None import pytorch_prototyping
label_desc: Use image node_id 2 for calling the LookupLayer obj's underlying member method code with example usage: obj.forward(obj_idx) and returns: net