.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;
        }

                        Integer.parseInt(match.group(2)),
                        Integer.parseInt(match.group(3))
                    )
                )
                .collect(Collectors.toCollection(TreeSet::new)),
            currentVersionProperty
        );
    }

    // for testkit tests, until BwcVersions is extracted into an extension

   *
   * <p>Note that {@code stream.collect(toMultiset(function, e -> 1, supplier))} is equivalent to
   * {@code stream.map(function).collect(Collectors.toCollection(supplier))}.
   *
   * <p>To collect to an {@link ImmutableMultiset}, use {@link
   * ImmutableMultiset#toImmutableMultiset}.
   *
   * @since 33.2.0 (available since 22.0 in guava-jre)
   */

   *
   * <p>Note that {@code stream.collect(toMultiset(function, e -> 1, supplier))} is equivalent to
   * {@code stream.map(function).collect(Collectors.toCollection(supplier))}.
   *
   * <p>To collect to an {@link ImmutableMultiset}, use {@link
   * ImmutableMultiset#toImmutableMultiset}.
   *
   * @since 22.0
   */