code: def forward(self, _, state=None):
      if state is None:
          raise ValueError
      return super(NetWithState, self).forward(_)
  
imports: import unittest
  import torch
  from torch.nn import Module, Linear
  import torch.nn.init
  import torchbearer
  from torchbearer import callbacks
label_desc: Use image node_id 1 for calling the NetWithState obj's underlying member method code with example usage: obj.forward(_, state) and returns: super