code: def test_return_stmt_noexpr_action(self) -> None:
      grammar_source = """
          start[mod_ty]: a=[statements] ENDMARKER { _PyAST_Module(a, NULL, p->arena) }
          statements[asdl_stmt_seq*]: a[asdl_stmt_seq*]=statement+ { a }
          statement[stmt_ty]: simple_stmt
          simple_stmt[stmt_ty]: small_stmt
          small_stmt[stmt_ty]: return_stmt
          return_stmt[stmt_ty]: a='return' NEWLINE { _PyAST_Return(NULL, EXTRA) }
          """
      test_source = """
          stmt = "return"
          self.verify_ast_generation(stmt)
          """
      self.run_test(grammar_source, test_source)
  
imports: import contextlib
  import subprocess
  import sysconfig
  import textwrap
  import unittest
  import os
  import shutil
  import tempfile
  from pathlib import Path
  from test import test_tools
  from test import support
  from test.support import os_helper, import_helper
  from test.support.script_helper import assert_python_ok
label_desc: Use image node_id 15 for calling the TestCParser obj's underlying member method code with example usage: obj.test_return_stmt_noexpr_action() without return types