r-cran-promises 1.0.1-2 (amd64 binary) in ubuntu focal

 Provides fundamental abstractions for doing asynchronous programming
 in R using promises. Asynchronous programming is useful for allowing a single
 R process to orchestrate multiple tasks in the background while also attending
 to something else. Semantics are similar to 'JavaScript' promises, but with a
 syntax that is idiomatic R.