private Meta createMeta(final Meta parent, final String feedName, final String typeName) {
        return securityContext.asProcessingUserResult(() -> {
            final Meta meta = metaService.create(createProps(parent, feedName, typeName));
            metaService.updateStatus(meta, Status.LOCKED, Status.UNLOCKED);
            return meta;
        });
    }
Make sure that it copes with a map not being in an early stream but is in a later one.
stroom-app/src/test/java/stroom/pipeline/refdata/TestReferenceData.java