code: def test_invalid_line_continuation_error_position(self):
      self._check_error(
          r"a = 3 \ 4",
          "unexpected character after line continuation character",
          lineno=1,
          offset=8,
      )
      self._check_error(
          "1,\\#\n2",
          "unexpected character after line continuation character",
          lineno=1,
          offset=4,
      )
      self._check_error(
          "\nfgdfgf\n1,\\#\n2\n",
          "unexpected character after line continuation character",
          lineno=3,
          offset=4,
      )
  
imports: import re
  import doctest
  import textwrap
  import unittest
  from test import support
label_desc: Use image node_id 27 for calling the SyntaxTestCase obj's underlying member method code with example usage: obj.test_invalid_line_continuation_error_position() without return types