@Override
 public IndexInformation getIndex(Identifier indexName) {
   return indexes().get(new Identifier(identifierHelper.toMetaDataObjectName(indexName), false));
 }
 @Override
 public ColumnInformation getColumn(Identifier columnIdentifier) {
   return columns.get(
       new Identifier(identifierHelper.toMetaDataObjectName(columnIdentifier), false));
 }
 @Override
 public ForeignKeyInformation getForeignKey(Identifier fkIdentifier) {
   return foreignKeys()
       .get(new Identifier(identifierHelper.toMetaDataObjectName(fkIdentifier), false));
 }