The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
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，这一点在夫子中也有详细论述
宇树科技董事长王兴兴在接受采访时表示自己深感荣幸，他说，此次活动是一个建立与德国更多企业合作的窗口，以及在全球范围内共同推动智能机器人产业发展的契机，德国市场潜力巨大，相信智能机器人和AI产业的良好发展态势，对行业发展和全人类都有非常好的作用。（新华社、中国新闻网）
provide as much warning as possible up front to users when enabling it