custom attributes with architect

how do I create the following custom attribute (mnuContext) in my view controller class using architect?

Code:

Ext.define('SolarUI.view.case.CaseViewController', {
    extend: 'Ext.app.ViewController',
    alias: 'controller.casesCtrl',

        .
        .
        .
        .
    mnuContext: new Ext.menu.Menu({
        items: [{
            id: 'do-something',
            text: 'Do something'
        }],
        listeners: {
            itemclick: function(item) {
                switch (item.id) {
                    case 'do-something':
                        break;
                }
            }
        }
    }),

    showView: function(view) {
        .
        .
        .
        .
    },

when trying with architect by adding a custom property I get the following mess:

Code:

config: {
        mnuContext: 'new Ext.menu.Menu({\n        items: [{\n            id: \'do-something\',\n            text: \'Do something\'\n        }],\n        listeners: {\n            itemclick: function(item) {\n                switch (item.id) {\n                    case \'do-something\':\n                        break;\n                }\n            }\n        }\n    })'
    },

custom attributes with architect