A simple question Using Access values in an actor in Swift

I am sure this is a simple question, but I cant see how to solve it. I am storing an array of my actors in an Array. I need to get access to some of its value in a .first( where:{} ) call. Here is a short example of what I want to do:

actor Counter{
    var number:Int
    
    init(number: Int) {
        self.number = number
    }
    
    func getNumber()->Int{
        return number
    }
}


var counters:[Counter] = []


func addCounter(){
    for i in 1...10 {
        let counter = Counter(number: i )
        counters.append( counter )
    }
}


func getCounter2( number:Int )->Counter?{
    let found = counters.first { counter in
        return counter.number == number //--error: Actor-isolated property 'number' can not be referenced from a nonisolated context
    }
    return found
}

Thanks for your help

You are fetching actor isolated property, and you simply cannot do that from a synchronous context. This is easily solved if you make getCounter2 an async method. Are you open to that?

func getCounter2(number: Int) async -> Counter? {
    for counter in counters {
        if await counter.number == number {
            return counter
        }
    }
    
    return nil
}

If you cannot support an asynchronous pattern like this, you may have to consider a significantly more dramatic refactoring of the problem.