marvelProvider-nonRX.swift

let provider = MoyaProvider<Marvel>()
// 1
state = .loading

// 2
provider.request(.comics) { [weak self] result in
  guard let self = self else { return }

  // 3
  switch result {
  case .success(let response):
    do {
      // 4
      print(try response.mapJSON())
    } catch {
      self.state = .error
    }
  case .failure:
    // 5
    self.state = .error
  }
}