.map(ServiceLoader.Provider::get)
                .map(CIDetector::detectCI)
                .filter(Optional::isPresent)
                .map(Optional::get)
                .collect(Collectors.toCollection(ArrayList::new));

        if (result.size() > 1) {
            // remove generic
            result.removeIf(c -> GenericCIDetector.NAME.equals(c.name()));
        }
        return result;
    }

            return;
        }

        final Set<File> filesToDelete = allFilesInCheckout.stream()
            .filter(each -> earlierFiles.contains(each.getName()))
            .collect(Collectors.toCollection(TreeSet::new));

        if (filesToDelete.isEmpty()) {
            LOGGER.warn("No files need to be deleted.");
            return;
        }