private Query getIn(final String fieldName,
                        final String value,
                        final IndexField indexField,
                        final Set<String> terms) {
        final Query query = getSubQuery(indexField, value, terms, true);
        return modifyOccurrence(query, Occur.SHOULD);
    }
Convert our query objects to a LUCENE query.
stroom-index/stroom-index-lucene553/src/main/java/stroom/index/lucene553/SearchExpressionQueryBuilder.java