Symfony DependencyInjection: How to represent Closure in YAML service definitions?
You have probably already solved this by now. But you can create a factory that returns a Closure
some_callback: public: false class: callback factory: [SomeClass\Factory, create]And you can pass that to the addConnector call:
Illuminate\Queue\QueueManager: arguments: app: "@app" calls: - [ addConnector, ["@Illuminate\\Queue\Connector\NullConnector", "@some_callback"]]