code: def original_layer_class():
      return ConvBertLayer
  
imports: from transformers.models.convbert.modeling_convbert import ConvBertLayer
  from parallelformers.policies.base import Layer, Policy
  from parallelformers.utils import AllReduceLinear
label_desc: Use image node_id 3 for calling the ConvBertPolicy obj's underlying member method code with example usage: obj.original_layer_class() and returns: ConvBertLayer