pub unsafe extern "C" fn g_test_add_vtable(
    testpath: *const i8,
    data_size: usize,
    test_data: *const c_void,
    data_setup: Option<unsafe extern "C" fn(_: *mut c_void, _: *const c_void)>,
    data_test: Option<unsafe extern "C" fn(_: *mut c_void, _: *const c_void)>,
    data_teardown: Option<unsafe extern "C" fn(_: *mut c_void, _: *const c_void)>
)