code: func (v *DeviceManager) GetClientPointer() (*Device, error) {
  	c := C.gdk_device_manager_get_client_pointer(v.native())
  	if c == nil {
  		return nil, nilPtrErr
  	}
  
  	return &Device{glib.Take(unsafe.Pointer(c))}, nil
  }
docs: // GetClientPointer() is a wrapper around gdk_device_manager_get_client_pointer().