Nothing
library(checkmate)
library(mlr3)
lapply(list.files(system.file("testthat", package = "mlr3"),
pattern = "^helper.*\\.[rR]$", full.names = TRUE), source)
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.