code: def test_token_lexeme(en_vocab):
      """Test that tokens expose their lexeme."""
      token = Doc(en_vocab, words=["Hello", "world"])[0]
      assert isinstance(token.lex, Lexeme)
      assert token.lex.text == token.text
      assert en_vocab[token.orth] == token.lex
  
imports: import warnings
  import weakref
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from thinc.api import NumpyOps, get_current_ops
  from spacy.attrs import DEP, ENT_IOB, ENT_TYPE, HEAD, IS_ALPHA, MORPH, POS, SENT_START, TAG
  from spacy.lang.en import English
  from spacy.lang.xx import MultiLanguage
  from spacy.language import Language
  from spacy.lexeme import Lexeme
  from spacy.tokens import Doc, Span, SpanGroup, Token
  from spacy.vocab import Vocab
  from .test_underscore import clean_underscore
label_desc: Use image node_id 28 for calling a global function with example usage: test_token_lexeme(en_vocab) without return types