code: def test_various_words_with_significant_percentage():
      document = build_document(
          (
              "1 a",
              "2 b b",
              "3 c c c",
              "4 d d d",
              "5 z z z z",
              "6 e e e e e",
          )
      )
      summarizer = LuhnSummarizer()
      summarizer.stop_words = ("1", "2", "3", "4", "5", "6")
  
      returned = summarizer(document, 1)
      assert list(map(to_unicode, returned)) == [
          "6 e e e e e",
      ]
  
      returned = summarizer(document, 2)
      assert list(map(to_unicode, returned)) == [
          "5 z z z z",
          "6 e e e e e",
      ]
  
      returned = summarizer(document, 3)
      assert list(map(to_unicode, returned)) == [
          "3 c c c",
          "5 z z z z",
          "6 e e e e e",
      ]
  
file_path: sumy/tests/test_summarizers/test_luhn.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from sumy._compat import to_unicode
  from sumy.nlp.stemmers.czech import stem_word
  from sumy.nlp.tokenizers import Tokenizer
  from sumy.parsers.plaintext import PlaintextParser
  from sumy.summarizers.luhn import LuhnSummarizer
  from sumy.utils import get_stop_words
  from ..utils import build_document
label_desc: Use image node_id 6 for calling a global function with example usage: test_various_words_with_significant_percentage() without return types