class_docstr: Encoder based on a user-supplied vocabulary (file or list).
code: def sil_phonemes(self):
      return [
          p for p in self._id_to_token.values() if not p[0].isalpha()
      ]
  
imports: import re
  import six
label_desc: Use image node_id 16 for calling the TokenTextEncoder obj's underlying member method code with example usage: obj.sil_phonemes() and returns: unknown