docs: function(earliestTime, callback) {
              // If earliestTime parameter is not specified, then set callback to its value
              if (!callback && utils.isFunction(earliestTime)) {
                  callback = earliestTime;
                  earliestTime = undefined;
              }
  
              var query = "| datamodel \"" + this.dataModel.name + "\" " + this.name + " search | tscollect";
              var args = earliestTime ? {earliest_time: earliestTime} : {};
  
              this.dataModel.service.search(query, args, callback);
          }