I'm creating a custom grid where I want to display the portfolio items that are features and also the parent of the feature (which would be the portfolio item initiative). Is there any way I can do this?

var portfolioItemStore = Ext.create('Rally.data.wsapi.Store', {
            model: 'Portfolio Item', 
            autoLoad: true,
            listeners: {
                // ...
            },
            filters: [
                {
                    property: 'PortfolioItemType.Name',
                    value: 'Feature'
                }
            ],
            fetch: ['Name', 'PortfolioItemType', 'Parent'] // possible edit here
        });