@Override
 public boolean equalsGlobalArtifactIdentifier(GlobalArtifactIdentifier that) {
   return GlobalArtifactIdentifierImpl.equalsGlobalArtifactIdentifier(this, that);
 }
 @Override
 public int compareTo(GlobalArtifactIdentifier o) {
   return GlobalArtifactIdentifierImpl.compareTo(this, o);
 }