export var testClear = function () {
    // >> application-settings-clear
    appSettings.clear();
    // << application-settings-clear
    TKUnit.assert(!appSettings.hasKey(boolKey), "Failed to remove key: " + boolKey);
    TKUnit.assert(!appSettings.hasKey(stringKey), "Failed to remove key: " + stringKey);
    TKUnit.assert(!appSettings.hasKey(numberKey), "Failed to remove key: " + numberKey);
};

    public onClearSettings() {
        // >> app-settings-remove-key-code
        appSettings.remove("isTurnedOn");
        // << app-settings-remove-key-code

        // >> app-settings-remove-all-code
        appSettings.clear();
        // << app-settings-remove-all-code

        appSettings.setBoolean("isTurnedOn", false);
        this.isTurnedOn = appSettings.getBoolean("isTurnedOn", false);

        appSettings.setString("username", "Default name");
        this.username = appSettings.getString("username");

        appSettings.setNumber("locationX", 0.00);
        this.locationX = parseFloat(appSettings.getNumber("locationX").toFixed(2));

        this.someKey = appSettings.getString("noSuchKey", "No string value");
        this.noBoolKey = appSettings.hasKey("noBoolKey");
    }

 logout(){
     clear();
     this._routerExtensions.navigate(["/login"], { clearHistory: true });
 }