    /**
     * @class Ext.ux.PreviewPlugin
     * @extends Ext.AbstractPlugin
     *
     * The Preview enables you to show a configurable preview of a record.
     *
     * This plugin assumes that it has control over the features used for this
     * particular grid section and may conflict with other plugins.
     *
     * @alias plugin.preview
     * @ptype preview
     */
    Ext.define('Ext.ux.PreviewPlugin', {
        extend: 'Ext.AbstractPlugin',
        alias: 'plugin.preview',
        requires: ['Ext.grid.feature.RowBody', 'Ext.grid.feature.RowWrap'],

        // private, css class to use to hide the body
        hideBodyCls: 'x-grid-row-body-hidden',

        /**
         * @cfg {String} bodyField
         * Field to display in the preview. Must be a field within the Model definition
         * that the store is using.
         */
        bodyField: '',

        /**
         * @cfg {Boolean} previewExpanded
         */
        previewExpanded: true,

        constructor: function(config) {
            this.callParent(arguments);
            var bodyField   = this.bodyField,
                hideBodyCls = this.hideBodyCls,
                section     = this.getCmp(),
                features = [{
                    ftype: 'rowbody',
                    getAdditionalData: function(data, idx, record, orig, view) {
                        var o = Ext.grid.feature.RowBody.prototype.getAdditionalData.apply(this, arguments);
                        Ext.apply(o, {
                            rowBody: data[bodyField],
                            rowBodyCls: section.previewExpanded ? '' : hideBodyCls
                        });
                        return o;
                    }
                },{
                    ftype: 'rowwrap'
                }];

            section.previewExpanded = this.previewExpanded;
            if (!section.features) {
                section.features = [];
            }
            section.features = features.concat(section.features);
        },

        /**
         * Toggle between the preview being expanded/hidden
         * @param {Boolean} expanded Pass true to expand the record and false to not show the preview.
         */
        toggleExpanded: function(expanded) {
            var view = this.getCmp();
            this.previewExpanded = view.previewExpanded = expanded;
            view.refresh();
        }
    });