code: private static void current(ClassLoader loader, InjectorImpl manager)
    {
      Objects.requireNonNull(manager);
  
      synchronized (loader) {
        if (loader instanceof DynamicClassLoader) {
          _localManager.set(manager, loader);
        }
        else {
          _loaderManagerMap.put(loader, new SoftReference<>(manager));
        }
      }
    }
docs: Creates a new inject manager.