function(id) {
          // Turns off other statuses belonging to the same exclusion group.
          var eg = statusesMeta[id] && statusesMeta[id].exclusionGroup;
          if (eg) {
            var egStatuses = Object.keys(exclusionGroups[eg]);
            for (var i = 0; i < egStatuses.length; i++) {
              var item = egStatuses[i];
              if (item !== id) {
                this.turnOff(item);
              }
            }
          }
          return this.setOne(id, true);
        }