code: def _get_stems(stems_dir, filename):
      if not filename:
          return None
      stems_path = (stems_dir / filename).with_suffix(".txt")
      return _load_stems(stems_path)
  
imports: from __future__ import unicode_literals
  import json
  from collections import defaultdict
  from copy import deepcopy
  from pathlib import Path
  from future.utils import iteritems
  from snips_nlu.common.utils import get_package_path, is_package, json_string
  from snips_nlu.constants import CUSTOM_ENTITY_PARSER_USAGE, DATA_PATH, GAZETTEERS, NOISE, STEMS, STOP_WORDS, WORD_CLUSTERS, METADATA
  from snips_nlu.entity_parser.custom_entity_parser import CustomEntityParserUsage
label_desc: Use image node_id 27 for calling a global function with example usage: _get_stems(stems_dir, filename) and returns: _load_stems, None