docs: function f_anahtar_index_ekle_urun(anahtar_id, urun_id) {
          return Array.isArray(urun_id)
              ? result.dbQ.sadd_array([result.kp.anahtar.ssetIndexUrun(anahtar_id)].concat(urun_id))
              : result.dbQ.sadd(result.kp.anahtar.ssetIndexUrun(anahtar_id), urun_id);
      }