It seems like app(Imanghafoori\HeyMan\...lass)->init($eventName) of type Imanghafoori\HeyMan\Watc...egies\BasicEventManager is incompatible with the declared type Imanghafoori\HeyMan\ListenerApplier of property $eventManager.
Our type inference engine has found an assignment to a property that is incompatible
with the declared type of that property.
Either this assignment is in error or the assigned type should be added
to the documentation/type hint for that property..
This check looks for private methods that have been defined, but are not used inside the class.