presto-main/src/main/java/io/prestosql/metadata/QualifiedTablePrefix.java/QualifiedTablePrefix/asQualifiedObjectName
class QualifiedTablePrefix:    public Optional<QualifiedObjectName> asQualifiedObjectName()
    {
        if (tableName.isPresent()) {
            verify(schemaName.isPresent());
            return Optional.of(new QualifiedObjectName(catalogName, schemaName.get(), tableName.get()));
        }

        return Optional.empty();
    }