docs: public void registerOngoingOperation(
  			final K operationKey,
  			final CompletableFuture<R> operationResultFuture) {
  		final ResultAccessTracker<R> inProgress = ResultAccessTracker.inProgress();
  		registeredOperationTriggers.put(operationKey, inProgress);
  		operationResultFuture.whenComplete((result, error) -> {
  			if (error == null) {
  				completedOperations.put(operationKey, inProgress.finishOperation(Either.Right(result)));
  			} else {
  				completedOperations.put(operationKey, inProgress.finishOperation(Either.Left(error)));
  			}
  			registeredOperationTriggers.remove(operationKey);
  		});
  	}