code: def forward(self, x):
      out = x
      out = self.conv1(out)
      out = self.bn1(out)
      out = self.db1(out)
      out = self.db2(out)
      return out
  
imports: import unittest
  import torch
  import torch.nn
  from apex.fp16_utils import FP16Model
label_desc: Use image node_id 2 for calling the DummyNet obj's underlying member method code with example usage: obj.forward(x) and returns: out