code: def testCEscape(self):
      for escaped, escaped_utf8, unescaped in TEST_VALUES:
          self.assertEqual(
              escaped, text_encoding.CEscape(unescaped, as_utf8=False)
          )
          self.assertEqual(
              escaped_utf8,
              text_encoding.CEscape(unescaped, as_utf8=True),
          )
  
imports: from google.protobuf import text_encoding
label_desc: Use image node_id 1 for calling the TextEncodingTestCase obj's underlying member method code with example usage: obj.testCEscape() without return types