in src/main/java/org/apache/maven/resolver/internal/ant/types/RemoteRepository.java [93:104]
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 );
}