R Under development (unstable) (2024-05-22 r86590 ucrt) -- "Unsuffered Consequences"
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> source("helper/helper.R")
> 
> if (exists("anyNA", envir = baseenv())) {
+   f = get("anyNA", envir = baseenv())
+   expect_same = makeCompareFun(f, backports:::anyNA)
+ 
+   expect_same(1)
+   expect_same(NA)
+   expect_same(iris)
+   if (getRversion() >= "3.2.0") {
+     expect_same(list(1, 2, list(3, 4, list(NA))), recursive = FALSE)
+     expect_same(list(1, 2, list(3, 4, list(NA))), recursive = TRUE)
+   }
+ }
> 
> proc.time()
   user  system elapsed 
   0.18    0.12    0.29