code: def allennlp_collate(instances: List[Instance]) -> TensorDict:
      """
      This is the default function used to turn a list of `Instance`s into a `TensorDict`
      batch.
      """
      batch = Batch(instances)
      return batch.as_tensor_dict()
  
file_path: allennlp/allennlp/data/data_loaders/data_collator.py
imports: from typing import List
  from transformers.data.data_collator import DataCollatorForLanguageModeling
  from allennlp.common import Registrable
  from allennlp.data.batch import Batch
  from allennlp.data.data_loaders.data_loader import TensorDict
  from allennlp.data.instance import Instance
label_desc: Use image node_id 1 for calling a global function with example usage: allennlp_collate(instances) and returns: batch