class_docstr: Set the audio buffer to a fixed length.
code: def add_arguments(
      cls, parser: argparse.ArgumentParser
  ) -> argparse.ArgumentParser:
      group = parser.add_argument_group(cls.__name__)
  
      group.add_argument(
          "--audio-augmentation.set-fixed-length.enable",
          action="store_true",
          help="Use {}. This flag is useful when you want to study the effect of"
          " different transforms.".format(cls.__name__),
      )
      group.add_argument(
          "--audio-augmentation.set-fixed-length.length",
          default=16000,
          type=int,
          help="Length to which to trim or pad the audio buffer.",
      )
  
      return parser
  
imports: import argparse
  import math
  import pathlib
  import random
  from typing import Callable, Dict, List, Optional, Union
  import torch
  import torchaudio
  from data.transforms import TRANSFORMATIONS_REGISTRY, BaseTransformation
  from data.transforms.audio_aux import mfccs
label_desc: Use image node_id 2 for calling the SetFixedLength obj's underlying member method code with example usage: obj.add_arguments(cls, parser) and returns: parser