read a value from flash scope

flash4

    public String someViewAction() {
        System.out.println("flashExampleBean.someViewAction called");
        Flash fl = FacesContext.getCurrentInstance().getExternalContext().getFlash();
        Set flSet = fl.keySet();
        System.out.println("FL set size = " + flSet.size()
                + ", i1 value=" + fl.get("i1")
                + ", i2 value=" + fl.get("i2")
                + ", i3 value=" + fl.get("i3"));

        return "index_1";
    }