Petr Vácha

Add the sendHeartbeat method to the AbstractClient class

4

In a long running consumer I need to send the heartbeat frames periodically to prevent the client disconnection.

Strings not allowed in QueryBuilder::where parameters

14

Shouldn't strings be allowed in the QueryBuilder::where parameters? ``` $qb->select(['u']) ->from(User::class, 'u') ->where( $qb->expr()->isNotNull('u.foo') ) ``` I think the example above is a valid usecase and the isNotNull method returns...