code: func (v *ActionMap) LookupAction(actionName string) *Action {
  	c := C.g_action_map_lookup_action(v.native(), (*C.gchar)(C.CString(actionName)))
  	if c == nil {
  		return nil
  	}
  	return wrapAction(wrapObject(unsafe.Pointer(c)))
  }
docs: // LookupAction is a wrapper around g_action_map_lookup_action