• all() : tornado::test::runtests
• exists_on_path() : tornado::test::run_pyversion_tests
• implements() : tornado::test::twisted_test
• main() : tornado::test::run_pyversion_tests
• make_test_subclass() : tornado::test::twisted_test
• restore_signal_handlers() : tornado::test::twisted_test
• save_signal_handlers() : tornado::test::twisted_test