}

            @Override
            public String getIndexAdminIntegerFields() {
                return "";
            }

            @Override
            public String getIndexAdminLongFields() {
                return "content_length,favorite_count,click_count";
            }

            @Override
            public String getIndexAdminFloatFields() {
                return "boost";
            }

                }).collect(Collectors.toList()));
    }

    String getIndexAdminLongFields();

    default Set<String> getIndexAdminLongFieldSet() {
        @SuppressWarnings("unchecked")
        Set<String> fieldSet = (Set<String>) propMap.get(INDEX_ADMIN_LONG_FIELD_SET);
        if (fieldSet == null) {
            fieldSet = split(getIndexAdminLongFields(), ",")

     * comment: Long-type fields for admin in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexAdminLongFields();

    /**
     * Get the value for the key 'index.admin.float.fields'. <br>
     * The value is, e.g. boost <br>
     * comment: Float-type fields for admin in the index.