Function g_option_group_set_error_hook
pub unsafe extern "C" fn g_option_group_set_error_hook(
group: *mut GOptionGroup,
error_func: Option<unsafe extern "C" fn(*mut _GOptionContext, *mut GOptionGroup, *mut c_void, *mut *mut GError)>,
)pub unsafe extern "C" fn g_option_group_set_error_hook(
group: *mut GOptionGroup,
error_func: Option<unsafe extern "C" fn(*mut _GOptionContext, *mut GOptionGroup, *mut c_void, *mut *mut GError)>,
)