/** * Produces no value for a summary. This would be used for fields like `id` or other * value that does not aggregate. * @since 7.0 */Ext.define('Ext.data.summary.None', { extend: 'Ext.data.summary.Base', alias: 'data.summary.none', config: { /** * @cfg {Mixed} value * The value to report for the summary. */ value: null }, /** * Name of the summary function that appears in the {@link Ext.grid.plugin.Summaries} plugin */ text: 'None', calculate: function() { return this.getValue(); }});