if (!queryFieldConfig.isFacetField(f)) {
                    throw new SearchQueryException("Invalid facet field: " + f);
                }
                final String encodedField = BaseEncoding.base64().encode(f.getBytes(StandardCharsets.UTF_8));
                final TermsAggregationBuilder termsBuilder =
                        AggregationBuilders.terms(Constants.FACET_FIELD_PREFIX + encodedField).field(f);