code: def allowed_roles():
      return list(get_role_to_wave_map().keys())
  
imports: from __future__ import annotations
  import functools
  import io
  import os
  import tempfile
  import numpy
  import uuid
  import subprocess
  import time
  from src.tts_sentence_parsing import init_sentence_state, get_sentence, clean_sentence, detect_language
  from src.tts_utils import prepare_speech, get_no_audio, chunk_speed_change
  from src.utils import cuda_vis_check
  import torch
label_desc: Use image node_id 8 for calling a global function with example usage: allowed_roles() and returns: list