code: def exists(val):
      return val is not None
  
file_path: TTS/TTS/tts/layers/bark/hubert/kmeans_hubert.py
imports: import logging
  from pathlib import Path
  import torch
  from einops import pack, unpack
  from torch import nn
  from torchaudio.functional import resample
  from transformers import HubertModel
label_desc: Use image node_id 3 for calling a global function with example usage: exists(val) and returns: unknown