class_docstr: A container class for one CTM unit with start and length countable in frames.
      
code: def end_frame(self):
      return self.start_frame + self.length
  
file_path: NeMo/nemo/collections/asr/data/audio_to_ctm_dataset.py
imports: import json
  import os
  from dataclasses import dataclass
  from pathlib import Path
  from typing import Any, List, Tuple
  from nemo.collections.asr.data.audio_to_text_dataset import ASRPredictionWriter
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling the FrameCtmUnit obj's underlying member method code with example usage: obj.end_frame() and returns: unknown