code: def idx_to_answer(self, idx):
      return self.answer_processor.convert_idx_to_answer(idx)
  
file_path: mmf/mmf/datasets/builders/okvqa/dataset.py
imports: from typing import Type, Union
  import torch
  from mmf.common.sample import Sample
  from mmf.common.typings import MMFDatasetConfigType
  from mmf.datasets.builders.okvqa.database import OKVQAAnnotationDatabase
  from mmf.datasets.mmf_dataset import MMFDataset
  from mmf.datasets.processors import GraphVQAAnswerProcessor
label_desc: Use image node_id 6 for calling the OKVQADataset obj's underlying member method code with example usage: obj.idx_to_answer(idx) and returns: self