code: def __init__(self, model):
      super().__init__()
      self.model = model
      self.num_labels = 2
      self.qa_outputs = nn.Linear(
          self.model.config.hidden_size, self.num_labels
      )
  
file_path: transformers/src/transformers/models/longformer/convert_longformer_original_pytorch_lightning_to_pytorch.py
imports: import argparse
  import pytorch_lightning
  import torch
  from torch import nn
  from transformers import LongformerForQuestionAnswering, LongformerModel
label_desc: Use image node_id 1 to create a new LightningModel object from inherited base classes: pl with example: obj = LightningModel(model)