pub unsafe extern "C" fn g_signal_set_va_marshaller(
signal_id: guint,
instance_type: GType,
va_marshaller: GSignalCVaMarshaller,
)pub unsafe extern "C" fn g_signal_set_va_marshaller(
signal_id: guint,
instance_type: GType,
va_marshaller: GSignalCVaMarshaller,
)