Set<String> versions = new HashSet<String>();
for (Version version : c.releaseChannel.stable) {
versions.add(version.version);
}
stableVersions.addAll(versions);
Collections.sort(stableVersions, new VersionComparator());
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeQuietly(stream);
}