code: def test_unknown_future_flag(self):
      code = """
              from __future__ import nested_scopes
              from __future__ import rested_snopes  # typo error here: nested => rested
          """
      self.assertSyntaxError(
          code,
          lineno=2,
          message="future feature rested_snopes is not defined",
      )
  
imports: import __future__
  import ast
  import unittest
  from test.support import import_helper
  from test.support.script_helper import spawn_python, kill_python
  from textwrap import dedent
  import os
  import re
  import sys
label_desc: Use image node_id 8 for calling the FutureTest obj's underlying member method code with example usage: obj.test_unknown_future_flag() without return types