text: if (Meteor.isClient) {
      Template.checkboxFilter.created = function () {
        this.filter = new ReactiveTable.Filter('checkbox-filter', ['checked']);  
      };
      
      Template.checkboxFilter.helpers({
        checked: function () {
          if (Template.instance().filter.get() === "true") {
            return "checked";
          } 
          return "";
        } 
      });
      
      Template.checkboxFilter.events({
         "change .checkbox-filter": function (event, template) {
             if ($(event.target).is(":checked")) {
                 template.filter.set("true");
             } else {
                 template.filter.set("");
             }
         } 
      });
  }