in src/main/java/org/apache/maven/resolver/internal/ant/types/RemoteRepository.java [83:91]
public void setRefid(Reference ref) {
if (id != null || url != null || type != null || checksums != null || updates != null) {
throw tooManyAttributes();
}
if (releasePolicy != null || snapshotPolicy != null || authentication != null) {
throw noChildrenAllowed();
}
super.setRefid(ref);
}