if ( !isset( $this->managers[$name]['instance'] ) ) {
$class = $this->managers[$name]['class'];
$config = $this->managers[$name]['config'];
if ( !isset( $this->managers[$name]['instance'] ) ) {
$class = $this->managers[$name]['class'];
$config = $this->managers[$name]['config'];
$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
$lb = $lbFactory->newMainLB( $config['domain'] );
$dbw = $lb->getLazyConnectionRef( DB_MASTER, [], $config['domain'] );
$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
$lb = $lbFactory->newMainLB( $config['domain'] );
$dbw = $lb->getLazyConnectionRef( DB_MASTER, [], $config['domain'] );