public RefDataOffHeapStore getEffectiveStore(final MapDefinition mapDefinition) {
        Objects.requireNonNull(mapDefinition);
        return getEffectiveStore(mapDefinition.getRefStreamDefinition().getStreamId());
    }
Get all ref stores keyed by feed name

@return Map of feedName => {@link RefDataOffHeapStore}
stroom-pipeline/src/main/java/stroom/pipeline/refdata/store/offheapstore/DelegatingRefDataOffHeapStore.java