public boolean containsAll(final Collection<EffectiveMeta> collection) {
        return effectiveMetas.containsAll(collection);
    }
Find the latest {@link EffectiveMeta} in effectiveMetaSet that is before or equal to timeMs.
stroom-meta/stroom-meta-api/src/main/java/stroom/meta/api/EffectiveMetaSet.java