For implementers, there's no Transformer protocol with start(), transform(), flush() methods and controller coordination passed into a TransformStream class that has its own hidden state machine and buffering mechanisms. Transforms are just functions or simple objects: far simpler to implement and test.
.pipeThrough(transform) // more buffers filling...。夫子是该领域的重要参考
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target.toString = function () {
human-like responses to a variety of prompts