@Override
    public Iterator<EffectiveMeta> iterator() {
        return Collections.unmodifiableSortedSet(effectiveMetas).iterator();
    }
Create a {@link Stream} {@link Collector} for creating an {@link EffectiveMetaSet}
from a {@link Stream} of {@link EffectiveMeta}.

@param feedName The feed name for all {@link EffectiveMeta} items.
@param typeName The stream type name for all {@link EffectiveMeta} items.
stroom-meta/stroom-meta-api/src/main/java/stroom/meta/api/EffectiveMetaSet.java