class_docstr: Identity function is use to return identity
class_docstr_tok: ["Identity","function","is","use","to","return","identity"]
docstr: forward function 
          
docstr_tok: ["forward","function"]
code: def forward(self, x, degree_norm=None):
      """forward function"""
      return x
  
file_path: PGL/apps/PGLBox/src/models/auto_heter_gnn.py
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from collections import OrderedDict
  import paddle.static
  import pgl
  from .None import model_util
  from .None import layers
label_desc: Use image node_id 2 for calling the Identity obj's underlying member method code with example usage: obj.forward(x, degree_norm) and returns: x