# \#modify

**URL:** https://forums.swift.org/tag/modify/605.md

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## [⚠ Important packages are being released using unstable language features](https://forums.swift.org/t/important-packages-are-being-released-using-unstable-language-features/53576)

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**Author:** [@Karl](https://forums.swift.org/u/Karl)\
**Replies:** 45\
**Last updated:** [December 20, 2021, 8:58am UTC](https://forums.swift.org/t/important-packages-are-being-released-using-unstable-language-features/53576 "2021-12-20T08:58:03Z")

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As pointed out in the pitch thread, a number of libraries are already making use of the \_modify accessor: This thread is to discuss how we should deal with that. The problem is that if you use unstable language feature…