R Under development (unstable) (2023-11-03 r85470 ucrt) -- "Unsuffered Consequences"
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> # To run download functions you need an internet connection.
> # pref a fast one
> skip_download = function() {
+   if(!curl::has_internet() |
+      identical(Sys.getenv("DONT_DOWNLOAD_ANYTHING"), "true"))
+     skip("No connection to run download function.")
+ }
> 
> proc.time()
   user  system elapsed 
   0.21    0.04    0.26