code: def forward(self, x):
      return x
  
file_path: PaddleSeg/contrib/MedicalSeg/medicalseg/models/layers/layer_libs.py
imports: import os
  import paddle
  import paddle.nn
label_desc: Use image node_id 2 for calling the Identity obj's underlying member method code with example usage: obj.forward(x) and returns: x