code: public static void resetOnOperatorError(String key) {
  		Objects.requireNonNull(key, "key");
  		log.debug("Reset onOperatorError: {}", key);
  		synchronized (log) {
  			onOperatorErrorHooks.remove(key);
  			onOperatorErrorHook = createOrUpdateOpErrorHook(onOperatorErrorHooks.values());
  		}
  	}
docs: Remove the sub-hook with key {@code key} from the onOperatorError hook. No-op if
  no such key has been registered, and equivalent to calling {@link #resetOnOperatorError()}
  if it was the last sub-hook.
  
  @param key the key of the sub-hook to remove