reactor-core/src/main/java/reactor/core/publisher/Hooks.java
public static void resetOnEachOperator(String key) {
		Objects.requireNonNull(key, "key");
		log.debug("Reset onEachOperator: {}", key);

		synchronized (log) {
			onEachOperatorHooks.remove(key);
			onEachOperatorHook = createOrUpdateOpHook(onEachOperatorHooks.values());
		}
	}
public static void resetOnEachOperator(String key) {
		Objects.requireNonNull(key, "key");
		log.debug("Reset onEachOperator: {}", key);

		synchronized (log) {
			onEachOperatorHooks.remove(key);
			onEachOperatorHook = createOrUpdateOpHook(onEachOperatorHooks.values());
		}
	}
Remove the sub-hook with key {@code key} from the onEachOperator hook. No-op if
no such key has been registered, and equivalent to calling {@link #resetOnEachOperator()}
if it was the last sub-hook.

@param key the key of the sub-hook to remove