Method shared_gil

include/pybind11/pybind11.h:1455–1455

        return multiple_interpreters(level::not_supported);
    }
    static multiple_interpreters shared_gil() { return multiple_interpreters(level::shared_gil); }
    static multiple_interpreters per_interpreter_gil() {
        return multiple_interpreters(level::per_interpreter_gil);
    }