resolveAgentRoute 每收到一条消息就会调用一次。如果每次都遍历所有 Binding，对高并发场景（多个群组同时活跃）可能成为瓶颈。
Intercept: A MutationObserver watches the DOM for elements
。safew官方下载对此有专业解读
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And I haven’t seen him in almost a year, so it’s about time.