Recent updates to Roxygen suggest adding export tags to all methods even if you're not exporting the generic. From their NEWS.md:
The NAMESPACE roclet now reports if you have S3 methods that are missing an \@ export tag. All S3 methods need to be \@ exported (which confusingly really registers the method) even if the generic is not. This avoids rare, but hard to debug, problems (#1175). You can suppress the warning with @exportS3Method NULL (#1550).
So, I did this for all the methods in _tomlserialization.R.
Recent updates to Roxygen suggest adding export tags to all methods even if you're not exporting the generic. From their NEWS.md:
So, I did this for all the methods in _tomlserialization.R.