return qualifier;
    }

    public boolean isSnapshot() {
        return this.qualifier != null && this.qualifier.level == QualifierLevel.SNAPSHOT;
    }

    public QualifiedVersion withoutQualifier() {
        return new QualifiedVersion(major, minor, revision, null);
    }

    private static final Comparator<QualifiedVersion> COMPARATOR = Comparator.comparing((QualifiedVersion v) -> v.major)

        // For the purpose of generating the index, snapshot versions are the same as released versions. Prerelease versions are not.
        versionsSet.stream().map(v -> v.isSnapshot() ? v.withoutQualifier() : v).forEach(versions::add);

        final List<String> includeVersions = versions.stream()
            .map(v -> v.hasQualifier() ? v.toString() : v.getMajor() + "." + v.getMinor())
            .distinct()

<% for (version in changelogsByVersionByTypeByArea.keySet()) {
def unqualifiedVersion = version.withoutQualifier()
%>[[release-notes-$unqualifiedVersion]]
== {es} version ${unqualifiedVersion}
<% if (version.isSnapshot()) { %>
coming[$unqualifiedVersion]
<% } %>
Also see <<breaking-changes-${ version.major }.${ version.minor },Breaking changes in ${ version.major }.${ version.minor }>>.
<% if (changelogsByVersionByTypeByArea[version]["security"] != null) { %>