class_docstr: Identity layer
  The output of this layer is the input without any change.
  Use this layer to avoid using 'if' condition in forward methods
code: def __init__(self):
      super().__init__()
  
imports: import copy
  import paddle
  import paddle.nn
  from disco_diffusion_ernievil_base.vit_b_16x.ernievil2.transformers.droppath import DropPath
label_desc: Use image node_id 1 to create a new Identity object from inherited base classes: nn with example: obj = Identity()