just to check if there are any VCL's of thar particular type type assigned to this class, right?
I had the phase listener implement VCL, but you can use any class, I was just using a simple example for email sake.
have the assignableFrom code which doesn't compile.
I just typed the code in to the email, not a compiler. I think it may be Class.isAssignableFrom(Class) or something, just check the Class class API.

