code: func (v *Object) HandlerDisconnect(handle SignalHandle) {
  	C.g_signal_handler_disconnect(C.gpointer(v.GObject), C.gulong(handle))
  	C.g_closure_invalidate(signals[handle])
  	delete(closures.m, signals[handle])
  	delete(signals, handle)
  }
docs: // HandlerDisconnect is a wrapper around g_signal_handler_disconnect().