var httpClient = HttpClient()..connectionTimeout = const Duration(seconds: 5);
    var request = await httpClient.getUrl(url);

D/skia    ( 5333): Program linking failed.
E/flutter ( 5333): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: NoSuchMethodError: The method 'setOption' was called on null.
E/flutter ( 5333): Receiver: null
E/flutter ( 5333): Tried calling: setOption(Instance of 'SocketOption', true)

$ flutter doctor -v
[√] Flutter (Channel stable, v1.2.1, on Microsoft Windows [Version
    10.0.17763.379], locale en-US)
    • Flutter version 1.2.1 at C:\Software\flutter
    • Framework revision 8661d8aecd (3 months ago), 2019-02-14 19:19:53 -0800
    • Engine revision 3757390fa4
    • Dart version 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)

[√] Android toolchain - develop for Android devices (Android SDK version
    28.0.3)
    • Android SDK at C:\Users\claud\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native
      profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build
      1.8.0_152-release-1343-b01)
    • All Android licenses accepted.

[√] Android Studio (version 3.4)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 35.1.1
    • Dart plugin version 183.6270
    • Java version OpenJDK Runtime Environment (build
      1.8.0_152-release-1343-b01)

[!] VS Code (version 1.33.1)
    • VS Code at C:\Users\claud\AppData\Local\Programs\Microsoft VS Code
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[√] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 9
      (API 28) (emulator)

! Doctor found issues in 1 category.