# \#add-ons

**URL:** https://discourse.julialang.org/tag/add-ons/967.md

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## [Extend package methods / write add-ons](https://discourse.julialang.org/t/extend-package-methods-write-add-ons/77531)

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**Author:** [@fipelle](https://discourse.julialang.org/u/fipelle)\
**Replies:** 3\
**Last updated:** [February 27, 2024, 9:06pm UTC](https://discourse.julialang.org/t/extend-package-methods-write-add-ons/77531 "2024-02-27T21:06:06Z")

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Hi, I am trying to write an add-on for a package, but I am struggling with a – likely minor – issue. Suppose that some package has a function function foo(S1::Any) .... bar(S1) .... and bar(S1) is defined …