[RSS Feed/News] How do I extend any third party add-on class?

[XenForo]

Hello everyone!
How can I extend third party add-on class?

Example: Like as resource version we can use XFCP_ResourceVersion but if the add-on is third party how I can extend the class?

I used, as below
Code:

$class = \XF::extendClass('XF\Str\AnyAddon');

But the result was null.

ادامه مطلب...