private CompletableFuture<OperationOutcome>[] attachFutures(PipelineControllerFuture<OperationOutcome> controller,
List<Supplier<CompletableFuture<OperationOutcome>>> futureMakers,
UnaryOperator<CompletableFuture<OperationOutcome>> adorn) {
if (futureMakers.isEmpty()) {
private CompletableFuture<OperationOutcome>[] attachFutures(PipelineControllerFuture<OperationOutcome> controller,
List<Supplier<CompletableFuture<OperationOutcome>>> futureMakers,
UnaryOperator<CompletableFuture<OperationOutcome>> adorn) {
if (futureMakers.isEmpty()) {