public IndexFieldSource indexFieldSource() {
        if (_indexFieldSource == null)
            _indexFieldSource = new IndexFieldSource(this, Keys.INDEX_FIELD_FK_INDEX_FIELD_SOURCE_ID);

        return _indexFieldSource;
    }
Get the implicit join path to the <code>stroom.index_field_source</code>
table.
stroom-index/stroom-index-impl-db-jooq/src/main/java/stroom/index/impl/db/jooq/tables/IndexField.java