presto-main/src/main/java/io/prestosql/security/AccessControlManager.java/AccessControlManager/getConnectorAccessControl
class AccessControlManager:    private CatalogAccessControlEntry getConnectorAccessControl(TransactionId transactionId, String catalogName)
    {
        return transactionManager.getOptionalCatalogMetadata(transactionId, catalogName)
                .map(metadata -> connectorAccessControl.get(metadata.getCatalogName()))
                .orElse(null);
    }