add missing type parameter on methods (#22096)
diff --git a/packages/flutter_tools/lib/src/version.dart b/packages/flutter_tools/lib/src/version.dart
index e1dea0e..98612c0 100644
--- a/packages/flutter_tools/lib/src/version.dart
+++ b/packages/flutter_tools/lib/src/version.dart
@@ -161,7 +161,7 @@
static Future<Null> _removeVersionCheckRemoteIfExists() async {
final List<String> remotes = (await _run(<String>['git', 'remote']))
.split('\n')
- .map((String name) => name.trim()) // to account for OS-specific line-breaks
+ .map<String>((String name) => name.trim()) // to account for OS-specific line-breaks
.toList();
if (remotes.contains(_versionCheckRemote))
await _run(<String>['git', 'remote', 'remove', _versionCheckRemote]);