code: def forward(self, x):
      out = self.relu(self.bn(self.conv(x)))
      return out
  
imports: from typing import Union, List, Tuple
  import math
  import paddle
  import paddle.nn
  import stdc1_seg_cityscapes.layers
label_desc: Use image node_id 2 for calling the ConvBNRelu obj's underlying member method code with example usage: obj.forward(x) and returns: out