code: def test_should_not_avoid_synomyms_variations_collision(self):
      # Given
      dataset = {
          "intents": {
              "dummy_but_tricky_intent": {
                  "utterances": [
                      {
                          "data": [
                              {
                                  "text": "dummy_value",
                                  "entity": "dummy_but_tricky_entity",
                                  "slot_name": "dummy_but_tricky_slot",
                              }
                          ]
                      }
                  ]
              }
          },
          "entities": {
              "dummy_but_tricky_entity": {
                  "data": [
                      {"value": "a", "synonyms": ["favorïte"]},
                      {"value": "b", "synonyms": ["favorite"]},
                  ],
                  "use_synonyms": True,
                  "automatically_extensible": False,
                  "matching_strictness": 1.0,
              }
          },
          "language": "en",
      }
  
      # When
      dataset = validate_and_format_dataset(dataset)
  
      # Then
      entity = dataset["entities"]["dummy_but_tricky_entity"]
      expected_utterances = {
          "A": "a",
          "B": "b",
          "DummyValue": "dummy_value",
          "Dummy_Value": "dummy_value",
          "Favorïte": "a",
          "a": "a",
          "b": "b",
          "dummy_value": "dummy_value",
          "dummyvalue": "dummy_value",
          "favorite": "b",
          "favorïte": "a",
      }
      self.assertDictEqual(expected_utterances, entity["utterances"])
  
imports: from __future__ import unicode_literals
  import io
  from builtins import range, str
  from future.utils import iteritems
  from mock import mock, patch
  from snips_nlu.constants import ENTITIES, SNIPS_DATETIME, VALIDATED
  from snips_nlu.dataset import Dataset
  from snips_nlu.dataset.validation import validate_and_format_dataset, _validate_and_format_custom_entity
  from snips_nlu.exceptions import DatasetFormatError
  from snips_nlu.tests.utils import SnipsTest, EntityParserMock
label_desc: Use image node_id 16 for calling the TestDatasetValidation obj's underlying member method code with example usage: obj.test_should_not_avoid_synomyms_variations_collision() without return types