There is no $options property in Connection

[garak]

DblibSchemaManager is using $this->_conn->options, where $this->_conn is an istance of Doctrine\DBAL\Connection.
Unfortunately, Doctrine\DBAL\Connection doesn't have any property named $options, not even in older versions of Doctrine.
So, I'm getting a notice "Notice: Undefined property: Doctrine\DBAL\Connection::$options"