class_docstr: Dataset for Annotations used in MMF
  
  TODO: Update on docs sprint
code: def _load_visual_dialog(self, path):
      from mmf.datasets.builders.visual_dialog.database import (
          VisualDialogDatabase,
      )
  
      self.data = VisualDialogDatabase(path)
      self.metadata = self.data.metadata
      self.start_idx = 0
  
file_path: mmf/mmf/datasets/databases/annotation_database.py
imports: import json
  import numpy
  import torch
  from mmf.utils.file_io import PathManager
  from mmf.utils.general import get_absolute_path
label_desc: Use image node_id 6 for calling the AnnotationDatabase obj's underlying member method code with example usage: obj._load_visual_dialog(path) without return types