ucan-ext-js-kitchen-sink/app/desktop/src/model/CompositeItem.js

my-ext-gen-app description for Ext JS app MyExtGenApp

Ext.define('UCANSink.model.CompositeItem', {
  extend: 'UCANSink.model.Item',
  alternateClassName: 'CompositeItem',

  fields: [
    {name: 'sequence', type: 'int'},
    {
      type: 'auto',
      name: 'items',
      defaultValue: [],
      convert: function(value) {
        if (!Ext.isEmpty(value) ) {
            return value.map(entry => entry.data ?  entry.data : entry);
        } else {
          return [];
        }
      }
    }
  ]
});