code: def test_clean_page_squigglybracket(self):
      text_that_is_actually_code = """This page starts out with some text.
  Everything looks good at first, since these are sentences.
  But then, all of a sudden, there's a bunch of code like the next block.
  fn foo(a) { bar = a + 10; }."""
      clean_en, counters = self.run_clean_page(
          PageFeatures(
              text=text_that_is_actually_code,
              content_type=FAKE_CONTENT_TYPE,
              content_length=FAKE_CONTENT_LENGTH,
              timestamp=FAKE_TIMESTAMP,
          )
      )
      self.assertIsNone(clean_en)
      self.assertEqual(
          {"filtered:squigglybracket": 1, "line-passed": 3},
          dict(counters),
      )
  
imports: import collections
  import os
  import six
  from tensorflow_datasets import testing
  from tensorflow_datasets.core.lazy_imports_lib import lazy_imports
  from tensorflow_datasets.text import c4_utils
label_desc: Use image node_id 4 for calling the C4UtilsTest obj's underlying member method code with example usage: obj.test_clean_page_squigglybracket() without return types