Need to use an action hook within a function from the public class. How do I access the loader then refer to the public class itself?

[devcon7]

Inside of the core plugin class, I am inserting a filter or an action hook under the "define_public_hooks".

Then the function called within the public class checks for conditions and needs to call another function from the same class via add_filter or add_action. Unfortunately, all hooks must go through the loader and referencing itself without using the loader doesn't work.

Any idea on how I can achieve this?

Thanks a lot for your help in advance!