code: private static ReloadableType getReloadableTypeIfHasBeenReloaded(Class<?> clazz) {
  		if (TypeRegistry.nothingReloaded) {
  			return null;
  		}
  		ReloadableType rtype = getRType(clazz);
  		if (rtype != null && rtype.hasBeenReloaded()) {
  			return rtype;
  		}
  		else {
  			return null;
  		}
  	}
docs: If clazz is reloadable <b>and</b> has been reloaded at least once then return the ReloadableType instance for it,
  otherwise return null.
  
  @param clazz the type which may or may not be reloadable
  @return the reloadable type or null