code: function(sType, aArgs, oSelf) {
          var category = aArgs[0];
          
          // Add category to the internal array of filters
          oSelf._categoryFilters.push(category);
  
          if(oSelf._elFt) {
              oSelf._createCategoryCheckbox(category);
          }
      }
docs: ///////////////////////////////////////////////////////////////////////////  Private event handlers  /////////////////////////////////////////////////////////////////////////// 
  Handles Logger's categoryCreateEvent.
  
  @method _onCategoryCreate
  @param sType {String} The event.
  @param aArgs {Object[]} Data passed from event firer.
  @param oSelf {Object} The LogReader instance.
  @private