R Under development (unstable) (2023-09-01 r85046 ucrt) -- "Unsuffered Consequences"
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> library(mirai.promises)
> `%...>%` <- promises::`%...>%`
> nanotest <- function(x) invisible(x || stop("is not TRUE when expected to be TRUE"))
> nanotest(promises::is.promise(p1 <- promises::as.promise(mirai::mirai("completed"))))
> nanotest(promises::is.promise(p2 <- mirai::mirai("completed") %...>% identity()))
> nanotest(mirai.promises:::..[["freq"]] == 0.1)
> nanotest(is.null(polling(freq = 1000)))
> nanotest(mirai.promises:::..[["freq"]] == 1L)
> nanotest(is.null(polling()))
> nanotest(mirai.promises:::..[["freq"]] == 0.1)
> Sys.sleep(3L)
> 
> proc.time()
   user  system elapsed 
   0.32    0.06    3.46