Function isWatchNodeDestroyed

packages/core/primitives/signals/src/watch.ts:82–84

(node: WatchNode)

  };

  function isWatchNodeDestroyed(node: WatchNode) {
    return node.fn === null && node.schedule === null;
  }

  function destroyWatchNode(node: WatchNode) {
    if (!isWatchNodeDestroyed(node)) {