Engine Code Stripping and Packages

I've encountered something that was a little unexpected and couldn't find any documentation on it with packman so I figured I'd post about it here. Using the SpriteShapes package, I have a prefab shipped in an AssetBundle (using the new Addressables) which references the SpriteShape component. In an IL2CPP build for iOS, this object came in blank and I noted the Missing Behaviour warning in the XCode logs.

Adding the package to a link.xml file seems to resolve the issue:

<linker>

    <assembly fullname="Unity.2D.SpriteShape.Runtime" preserve="all"/>

    <assembly fullname="Unity.2D.Common.Runtime" preserve="all"/>

</linker>

While this makes sense in retrospect (the component is only referenced on an object included in the StreamingAssets folder), it was a weird case and not obvious from the documentation. The official docs do mention that package components can be stripped, but only in regards to disabled components and packages.