[R] Prevent 'R CMD check' from reporting "NA"/"NA_character_" missmatch?

[Johannes Graumann]

Hello,

I'm writing a package am running 'R CMD check' on it.

Is there any way to make 'R CMD check' not warn about a missmatch between 
'NA_character_' (in the function definition) and 'NA' (in the 
documentation)?

Thanks for any help.

Sincerely, Joh