class ExperimentManager {

    Set<Experiment> experimentContainerId (Long containerIdentity) {
        return platformManager.getPlatforms()
                              .stream()
                              .map(Platform::getRoster)
                              .flatMap(Collection::stream)
                              .filter(container -> container.getIdentity() == containerIdentity)
                              .map(Container::createExperiment)
                              .map(this::addExperiment)
                              .collect(Collectors.toSet());
    }

}