return 0;
        }

        @Override
        protected IndexFieldData<?> buildFieldData(MappedFieldType ft) {
            IndexFieldDataCache indexFieldDataCache = indicesFieldDataCache.buildIndexFieldDataCache(new IndexFieldDataCache.Listener() {
            }, index, ft.name());
            return ft.fielddataBuilder("test", this::lookup).build(indexFieldDataCache, breakerService);
        }

        @Override