$conn = DriverManager::getConnection(array(
'wrapperClass' => 'Doctrine\DBAL\Sharding\PoolingShardConnection',
'driver' => 'pdo_sqlite',
'global' => array('memory' => true),
'shards' => array(
array('id' => 1, 'memory' => true),
array('id' => 2, 'memory' => true),
),
'shardChoser' => 'Doctrine\DBAL\Sharding\ShardChoser\MultiTenantShardChoser',
));
Invalid code here http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/sharding.html#generic-sql-sharding-support
Valid version must be