code: func Group(group string) (*apimachinery.GroupMeta, error) {
  	groupMeta, found := groupMetaMap[group]
  	if !found {
  		return nil, fmt.Errorf("group %v has not been registered", group)
  	}
  	groupMetaCopy := *groupMeta
  	return &groupMetaCopy, nil
  }
docs: // Group returns the metadata of a group if the gruop is registered, otherwise
  // an erorr is returned.