importJava "java.util.concurrent.Future" where
    data Future a
    
    @JavaName get
    getFutureResult :: Future a -> <Proc, Exception> a
    @JavaName cancel
    cancelFuture :: Future a -> Boolean -> <Proc> Boolean
    @JavaName isCancelled
    isFutureCancelled :: Future a -> <Proc> Boolean
    @JavaName isDone
    isFutureDone :: Future a -> <Proc> Boolean