Salesforce - Lightning - Redirect to a specif Page

From:

PageReference newpage = new PageReference('/apex/MyPage');
newpage.setRedirect(true); return newpage;

To: PageReference newpage = new PageReference('/one/one.app#/n/MyPage'); newpage.setRedirect(true);

 return newpage;




    function FF_GetVisualforcePageURL(pPage, pNamespace){
        var vLightning = '';
        if ((typeof sforce != 'undefined') && sforce && (!!sforce.one)) {
            vLightning = '/one/one.app#/alohaRedirect'
        }
       
        return vLightning + '/apex/' + pNamespace + pPage
    }