code: def forward(self, x):
      out = self.relu1(self.bn1(self.conv1(x)))
      out = self.conv2(out)
      return out
  
imports: import os
  import sys
  import paddle
  import paddle.nn
  import numpy
  from inference.ops import DistMaps3D, ScaleLayer, BatchImageNormalize3D
  from paddleseg.utils import utils
label_desc: Use image node_id 2 for calling the OutputTransition obj's underlying member method code with example usage: obj.forward(x) and returns: out