syncthing/lib/config/testdata/versioningconfig.xml

<configuration version="22">
    <folder id="test" path="testdata" type="readonly" ignorePerms="false" rescanIntervalS="600" autoNormalize="true">
        <versioning type="simple">
            <param key="foo" val="bar"/>
            <param key="baz" val="quux"/>
        </versioning>
    </folder>
</configuration>