docs: function getLastKnownUpdatedAt() {
          
          return Platform.async(function(callback) {
              callback();
          })().then(function() {
              
              if (pullQueryId) { // read lastKnownUpdatedAt from the store
                  return store.lookup(pulltimeTableName, pullQueryId, true /* suppressRecordNotFoundError */);
              }
  
          }).then(function(result) {
  
              if (result) {
                  return result.value;
              }
  
              return new Date (1970, 0, 0);
          });
      }