code: function onFilterResults(e) {
      var frag         = Y.one(Y.config.doc.createDocumentFragment()),
          resultNode   = getFilterResultNode(),
          typePlural   = filter.get('queryType'),
          typeSingular = typePlural === 'classes' ? 'class' : 'module';
  
      if (e.results.length) {
          YArray.each(e.results, function (result) {
              frag.append(Lang.sub(LIST_ITEM_TEMPLATE, {
                  rootPath    : APIList.rootPath,
                  displayName : filter.getDisplayName(result.highlighted),
                  name        : result.text,
                  typePlural  : typePlural,
                  typeSingular: typeSingular
              }));
          });
      } else {
          frag.append(
              '<li class="message">' +
                  'No ' + typePlural + ' found.' +
              '</li>'
          );
      }
  
      resultNode.empty(true);
      resultNode.append(frag);
  
      focusManager.refresh();
  }
docs: -- Event Handlers -----------------------------------------------------------