code: def setUp(self):
      super().setUp()
      self.nlp = spacy.load("en_core_web_sm")
  
      umls_fixture = UmlsKnowledgeBase(
          "tests/fixtures/umls_test_fixture.json",
          "tests/fixtures/test_umls_tree.tsv",
      )
      with tempfile.TemporaryDirectory() as dir_name:
          (
              umls_concept_aliases,
              tfidf_vectorizer,
              ann_index,
          ) = create_tfidf_ann_index(dir_name, umls_fixture)
      candidate_generator = CandidateGenerator(
          ann_index,
          tfidf_vectorizer,
          umls_concept_aliases,
          umls_fixture,
      )
  
      self.linker = EntityLinker(
          candidate_generator=candidate_generator,
          filter_for_definitions=False,
      )
  
file_path: scispacy/tests/test_linking.py
imports: import unittest
  import tempfile
  import spacy
  from scispacy.candidate_generation import CandidateGenerator, create_tfidf_ann_index
  from scispacy.linking import EntityLinker
  from scispacy.umls_utils import UmlsKnowledgeBase
  from scispacy.abbreviation import AbbreviationDetector
label_desc: Use image node_id 1 for calling the TestLinker obj's underlying member method code with example usage: obj.setUp() without return types