code: def _should_keep_symbol(s):
      return s in _symbol_to_id and s != "_" and s != "~"
  
file_path: textlesslib/textless/vocoders/tacotron2/text.py
imports: import numpy
  import re
  from .None import cleaners
  from .symbols import symbols
label_desc: Use image node_id 9 for calling a global function with example usage: _should_keep_symbol(s) and returns: unknown