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    override init() {
        super.init()
        UIViewController.classInit
    }

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import UIKit


let op1 = BlockOperation{
    let urlString = URL(string: "http://jsonplaceholder.typicode.com/users/1")
    if let url = urlString {
        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
            if error != nil {
                print(error)
            } else {

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let queue = OperationQueue()
queue.maxConcurrentOperationCount = 1
queue.addOperations([op1,op2,op3], waitUntilFinished: true)

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let queue = OperationQueue()
queue.maxConcurrentOperationCount = 1
op3.addDependency(op2)
op2.addDependency(op1)
queue.addOperations([op1,op2,op3], waitUntilFinished: true)

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import AsyncOperation
        
      let op1 = AsyncBlockOperation() { operation in
            operation.state = .executing
            
            let urlString = URL(string: "http://jsonplaceholder.typicode.com/users/1")
            if let url = urlString {
                let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
                    if error != nil {
                        print(error)

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import Firebase

class LoginConfigManager {
    
    static let shared = LoginConfigManager()
    
    var config:LoginConfig? = nil
    
    func getData() {
        let remoteConfig = RemoteConfig.remoteConfig()

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//
//	LoginConfig.swift
//
//	Create by Ahmed Tawfik on 15/1/2019
//	Copyright © 2019. All rights reserved.
//	Model file generated using JSONExport: https://github.com/Ahmed-Ali/JSONExport

import Foundation

struct LoginConfig : Codable {

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import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var label: UILabel!
    @IBOutlet weak var button: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        label.isHidden = LoginConfigManager.shared.config?.showLabel ?? false

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    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        // Use Firebase library to configure APIs
        FirebaseApp.configure()
        
        //get remote config from firebase
        LoginConfigManager.shared.getData()
        
        return true

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CLSLogv("Log awesomeness %d %d %@", getVaList([1, 2, "three"]))