AS3 refactoring: convert local var to instance var

this one should be pretty straigtforward but I cant seem to find it:

given that I start out like this:

public function someFunction():void {

          var someVar:String = "whatever";

}

lots of times I need to promote someVar to the instance level:

private var _someVar:String;

public function someFunction():void {

          _someVar = "whatever";

}

is there a refactor action for that? this is different from the create getters/setters action, in that I dont need those

thanks