;;; - DONE flushing the emf cache on method addition/removal
;;; - DONE (sort of, using wrappers/g-e-h-k) flushing the cache on class redefinition;
;;; - cache thread-safety.
;;; - DONE flushing the emf cache on method addition/removal
;;; - DONE (sort of, using wrappers/g-e-h-k) flushing the cache on class redefinition;
;;; - cache thread-safety.