class_docstr: Dataset for training a Nearest Neighbour model for zero shot intent recognition.
code: def __len__(self):
      return len(self.examples)
  
file_path: NeMo/nemo/collections/nlp/data/dialogue/dataset/dialogue_nearest_neighbour_dataset.py
imports: import torch
  from nemo.collections.nlp.data.dialogue.dataset.dialogue_dataset import DialogueDataset
label_desc: Use image node_id 4 for calling the DialogueNearestNeighbourDataset obj's underlying member method code with example usage: obj.__len__() and returns: len