docs: Collection<Class<?>> processNewListeners(Collection<ProbeListener> listeners) {
          Set<Class<?>> classesToTransform = new HashSet<Class<?>>();
  
          Set<ProbeListener> matchingListeners = new HashSet<ProbeListener>();
          Set<Class<?>> monitorableTemp;
          synchronized (this.monitorable) {
              monitorableTemp = new HashSet<Class<?>>(this.monitorable);
          }
          for (Class<?> clazz : monitorableTemp /* instrumentation.getAllLoadedClasses() */) {
              if (!isMonitorable(clazz)) {
                  continue;
              }
              for (ProbeListener listener : listeners) {
                  ProbeFilter filter = listener.getProbeFilter();
                  if (filter.matches(clazz)) {
                      matchingListeners.add(listener);
                  }
              }
              if (!matchingListeners.isEmpty()) {
                  classesToTransform.add(clazz);
                  addInterestedByClass(clazz, matchingListeners);
              }
              matchingListeners.clear();
          }
  
          return classesToTransform;
      }