docs: public static <IN> CompletableFuture<Void> thenAcceptAsyncIfNotDone(
  		CompletableFuture<IN> completableFuture,
  		Executor executor,
  		Consumer<? super IN> consumer) {
  		return completableFuture.isDone() ?
  			completableFuture.thenAccept(consumer) :
  			completableFuture.thenAcceptAsync(consumer, executor);
  	}