pub unsafe extern "C" fn g_cancellable_connect(
cancellable: *mut GCancellable,
callback: GCallback,
data: gpointer,
data_destroy_func: GDestroyNotify,
) -> c_ulong
pub unsafe extern "C" fn g_cancellable_connect(
cancellable: *mut GCancellable,
callback: GCallback,
data: gpointer,
data_destroy_func: GDestroyNotify,
) -> c_ulong