next.js

dfa35c46 - feat(turbopack): Add `__turbopack_original__` while tree shaking (#71547)

feat(turbopack): Add `__turbopack_original__` while tree shaking (#71547) ### What? Preserve the original import specifier when tree shaking, so the import analyzers after tree shaking can work. ### Why? This is required for `next/dynamic`. ### How? Closes PACK-3307