code: func RegisterGroup(groupMeta apimachinery.GroupMeta) error {
  	groupName := groupMeta.GroupVersion.Group
  	if _, found := groupMetaMap[groupName]; found {
  		return fmt.Errorf("group %v is already registered", groupMetaMap)
  	}
  	groupMetaMap[groupName] = &groupMeta
  	return nil
  }
docs: // RegisterGroup adds the given group to the list of registered groups.