code: def forward(self, x_left):
      x_right = self.conv_1x1(x_left)
      x_out = self.cell_forward(x_left, x_right)
      return x_out
  
imports: from collections import OrderedDict
  import torch
  import torch.nn
  import torch.utils.model_zoo
label_desc: Use image node_id 2 for calling the CellStem0 obj's underlying member method code with example usage: obj.forward(x_left) and returns: x_out