docs: function (view, options, uaIdentity) {
              logger.info('try to read cache for: ', view);
              var key = genKey(view, uaIdentity);
              var optsKey = JSON.stringify(options);
              var pool = cache[key] || [];
              var found = _.findWhere(pool, {options: optsKey});
  
              if (found && found.expireStamp > new Date().getTime()) {
                  found.hit = found.hit + 1;
                  logger.info('total cache copy: %s, found cache for: ', pool.length, view);
                  return found.str;
              } else {
                  logger.info('no cache for: ', view);
                  return false;
              }
          }