code: def normalize_token(token):
      from snips_nlu_utils import normalize
  
      if token.normalized_value:
          return token.normalized_value
      token.normalized_value = normalize(token.value)
      return token.normalized_value
  
file_path: snips-nlu/snips_nlu/preprocessing.py
imports: from __future__ import unicode_literals
  from builtins import object
  from snips_nlu.resources import get_stems
label_desc: Use image node_id 3 for calling a global function with example usage: normalize_token(token) and returns: token, token