import Foundation

class ImplementationTest {
    
    var data:[String: Any] = [:]
    
    
    func properties() {
        let group = DispatchGroup()

        group.enter()
        /// In the real code, an async operation is called which returns a value, that value is used to update the dictionary
        self.data.updateValue(true, forKey: "my_wonderful_key")
        group.leave()
        
        /// Same as above
        self.data.updateValue(true, forKey: "my_wonderful_key_2")
        group.leave()


        group.notify(queue: DispatchQueue.main, work: DispatchWorkItem(block: {
            print("Yay. Operation completed!")
        }))
    }
}