/*
 * Copyright (C) 2013 salesforce.com, inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
({
/*
 * These helper methods are in the renderer due to the many ways
 * that abstractList can be implemented.  Since controller methods
 * can be overridden, and component creation can be dynamic, putting
 * the relevant helper method call in the renderer ensures that the
 * emptyListContent is handled no matter how the list is implemented.
 */
    afterRender : function(component, helper){
        this.superAfterRender();
        helper.updateEmptyListContent(component);
    },
    rerender : function(component, helper){
        this.superRerender();
        if (component.getConcreteComponent().isDirty('v.items')) {
            helper.updateEmptyListContent(component);
        }
    }
})// eslint-disable-line semi

/*
 * Copyright (C) 2013 salesforce.com, inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
({
/*
 * These helper methods are in the renderer due to the many ways
 * that abstractList can be implemented.  Since controller methods
 * can be overridden, and component creation can be dynamic, putting
 * the relevant helper method call in the renderer ensures that the
 * emptyListContent is handled no matter how the list is implemented.
 */
    afterRender : function(component, helper){
        this.superAfterRender();
        helper.updateEmptyListContent(component);
    },
    rerender : function(component){
        this.superRerender();
        var concreteCmp = component.getConcreteComponent();
        if (concreteCmp.isDirty('v.items')) {
            concreteCmp.getDef().getHelper().updateEmptyListContent(component);
        }
    }
})// eslint-disable-line semi

Make renderer polymorphically call updateEmptyListContent