code: def original_layer_class():
      return BigBirdPegasusEncoderLayer
  
file_path: parallelformers/parallelformers/policies/bigbird_pegasus.py
imports: from transformers.models.bigbird_pegasus.modeling_bigbird_pegasus import BigBirdPegasusDecoderLayer, BigBirdPegasusEncoderLayer
  from parallelformers.policies.base import Layer, Policy
  from parallelformers.transformers.modeling_bart import BartAttention_
  from parallelformers.utils.dist_utils import AllReduceLinear
label_desc: Use image node_id 4 for calling the BigBirdPegasusEncoderPolicy obj's underlying member method code with example usage: obj.original_layer_class() and returns: BigBirdPegasusEncoderLayer