code: func (v *Display) GetPrimaryMonitor() (*Monitor, error) {
  	c := C.gdk_display_get_primary_monitor(v.native())
  	if c == nil {
  		return nil, nilPtrErr
  	}
  
  	return &Monitor{glib.Take(unsafe.Pointer(c))}, nil
  }
docs: // GetPrimaryMonitor is a wrapper around gdk_display_get_primary_monitor().