commit 2d3ff10d62a1f1fdcbdbe92cbcc5a5594f95d500
author Alexandre Ardhuin <alexandre.ardhuin@gmail.com> Fri Oct 05 07:54:56 2018 +0200
committer GitHub <noreply@github.com> Fri Oct 05 07:54:56 2018 +0200
tree 5a763e2788a747f065712baa383e7abf9070bc8f
parent c26b56cba37bcec067209c0aaecc6b8113b5f090

apply lint prefer_void_to_null in packages/flutter_tools (#22686)

packages/flutter_tools/lib/src/run_cold.dart

diff --git a/packages/flutter_tools/lib/src/run_cold.dart b/packages/flutter_tools/lib/src/run_cold.dart
index 18a12c5..32e415e 100644
--- a/packages/flutter_tools/lib/src/run_cold.dart
+++ b/packages/flutter_tools/lib/src/run_cold.dart
@@ -109,16 +109,16 @@
   }
 
   @override
-  Future<Null> handleTerminalCommand(String code) async => null;
+  Future<void> handleTerminalCommand(String code) async => null;
 
   @override
-  Future<Null> cleanupAfterSignal() async {
+  Future<void> cleanupAfterSignal() async {
     await stopEchoingDeviceLog();
     await stopApp();
   }
 
   @override
-  Future<Null> cleanupAtFinish() async {
+  Future<void> cleanupAtFinish() async {
     await stopEchoingDeviceLog();
   }
 
@@ -152,7 +152,7 @@
   }
 
   @override
-  Future<Null> preStop() async {
+  Future<void> preStop() async {
     for (FlutterDevice device in flutterDevices) {
       // If we're running in release mode, stop the app using the device logic.
       if (device.vmServices == null || device.vmServices.isEmpty)