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someAsyncFunction { 
  anotherAsyncFunction1 {
    anotherAsyncFunction2 {
      anotherAsyncFunction3 {
        anotherAsyncFunction4 {
          // Thanks to God this has no error handling 😰
        }
      }
    }
  }

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func getUser(withID id: Int) -> Future<User> {
  return Future { completion in
    // Here you call an API
    // that returns the user you are looking for.
    APIClient.get(getUserURL(id: id)) { user in
      completion(.success(user))
    }
  }
}

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[
  {
    "elementType": "geometry",
    "stylers": [
      {
        "color": "#ebe3cd"
      }
    ]
  },
  {

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private func configureTileOverlay() {
        // We first need to have the path of the overlay configuration JSON
        guard let overlayFileURLString = Bundle.main.path(forResource: "overlay", ofType: "json") else {
                return
        }
        let overlayFileURL = URL(fileURLWithPath: overlayFileURLString)
        
        // After that, you can create the tile overlay using MapKitGoogleStyler
        guard let tileOverlay = try? MapKitGoogleStyler.buildOverlay(with: overlayFileURL) else {
            return

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func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
        // This is the final step. This code can be copied and pasted into your project
        // without thinking on it so much. It simply instantiates a MKTileOverlayRenderer
        // for displaying the tile overlay.
        if let tileOverlay = overlay as? MKTileOverlay {
            return MKTileOverlayRenderer(tileOverlay: tileOverlay)
        } else {
            return MKOverlayRenderer(overlay: overlay)
        }
}

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//
//  ViewController.swift
//  MapKitGoogleStylerExample
//
//  Created by Fernando Ortiz on 2/6/17.
//  Copyright © 2017 Fernando Martín Ortiz. All rights reserved.
//

import UIKit
import MapKit

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//
//  Task.swift
//  TaskFramework
//
//  Created by Fernando Ortiz on 2/7/17.
//  Copyright © 2017 Fernando Martín Ortiz. All rights reserved.
//
import Foundation

public enum TaskError: Error {

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//
//  Request.swift
//
//  Created by Fernando Ortiz on 2/12/17.
//

import Foundation

enum HTTPMethod: String {
    case get, post, put, patch, delete

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//
//  NetworkDispatcher.swift
//
//  Created by Fernando Ortiz on 2/11/17.
//  Copyright © 2017 Fernando Martín Ortiz. All rights reserved.
//

import Foundation
import RxSwift

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//
//  Task.swift
//
//  Created by Fernando Ortiz on 2/11/17.
//

import Foundation
import RxSwift

class Task<Input, Output> {