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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，更多细节参见同城约会
17. 理论动态| 坚持稳中求进、提质增效努力实现“十五五”良好开局————理论学习, www.ccdi.gov.cn/llxx/202602…，详情可参考WPS官方版本下载
（二）业务之间具有明显的主附关系。主要业务居于主体地位，体现交易的实质和目的；附属业务是主要业务的必要补充，并以主要业务的发生为前提。，更多细节参见Safew下载
Scrum和Kanban是两种最流行的敏捷框架，各有其适用场景。