code: function(v, oSelf) {
          var source = this.source;
          if(!this.checked) {
              oSelf.hideSource(source);
          }
          else {
              oSelf.showSource(source);
          }
      }
docs: Handles check events on the category filter checkboxes.
  
  @method _onCheckSource
  @param v {HTMLEvent} The click event.
  @param oSelf {Object} The LogReader instance.
  @private