test/splitting/arrows.unit - external/github.com/dart-lang/dart_style - Git at Google

 40 columns                              |
 >>>
 myFunction() => argument + anotherArgument;
 <<<
 myFunction() =>
     argument + anotherArgument;
	40 columns \|
	>>>
	myFunction() => argument + anotherArgument;
	<<<
	myFunction() =>
	argument + anotherArgument;