How to call the implemented hook_profile2_access() function? I'm rather inexperienced in module development, sometimes I have really basic issues: I'd like to grant custom access to user profiles. I think I can do it with the implementation of hook_profile2_access() (profile2 and profile2_og_access submodule use such implementations)

I added the mymodule_profile2_access() to my module but I don't know how/when it would be called?
Well, it was a typical user error: The implemented mymodule_profile2_access() function is called only for non-admin users and I checked it with administrator. So simple...