private boolean isEnabled(final IndexVolume volume) {
        final VolumeUseState volumeUseState = NullSafe.get(volume, IndexVolume::getState);
        return VolumeUseState.ACTIVE == volumeUseState;
    }
Add the columns to the table.
stroom-core-client/src/main/java/stroom/index/client/presenter/IndexVolumeStatusListPresenter.java