private String wordToAdditionalSourcesStr(final Word word) {
        if (word == null || NullSafe.isEmptyCollection(word.getAdditionalSourceUuids())) {
            return null;
        } else {
            return word.getAdditionalSourceUuids()
                    .stream()
                    .map(wordList::getSource)
                    .filter(Optional::isPresent)
                    .map(Optional::get)
                    .map(DocRef::getName)
                    .collect(Collectors.joining(", "));
        }
    }
Add the columns to the table.
stroom-core-client/src/main/java/stroom/dictionary/client/presenter/WordListPresenter.java