[R-pkg-devel] S4 methods

Dear members

I just finished some minor updates to an R package (sizeMat) I've had on
CRAN (haven't had to update in a month). My package passes Check on my
local machine, but it just bounced back from CRAN with the message

Warning: S4 exports specified in 'NAMESPACE' but not defined in package
'sizeMat'

I use roxygen2 to build my package NAMESPACE and don't have any S4 exports
that I'm aware of.

Perhaps this might be related to changes in R version 4.0.0?
How could I fix this problem?

Thanks.

Edgar Josymar Torrej?n Magallanes

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