code: func (m MultiRESTMapper) RESTMapping(gk unversioned.GroupKind, versions ...string) (mapping *RESTMapping, err error) {
  	for _, t := range m {
  		mapping, err = t.RESTMapping(gk, versions...)
  		if err == nil {
  			return
  		}
  	}
  	return
  }
docs: // RESTMapping provides the REST mapping for the resource based on the
  // kind and version. This implementation supports multiple REST schemas and
  // return the first match.