Does importFrom allow importing internal functions?

Package development
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1

I wanted to use an internal function from another package in a package I am working on. The package is already a dependency, and I realized it additionally has an internal function that would be convenient for my code.

Is
#' @importFrom package internal_function

valid? or is there some other preferred way to import it

2

You cannot import internal functions. You can copy them into your package if the licenses allow that.