They might be referring to `Pin`. See https://doc.rust-lang.org/stable/std/pin/index.html https://doc.rust-lang.org/stable/std/pin/index.html and also https://r

They might be referring to `Pin`. See https://doc.rust-lang.org/stable/std/pin/index.html https://doc.rust-lang.org/stable/std/pin/index.html and also https://rust-lang.github.io/async-book/04_pinning/01_chapter.html https://rust-lang.github.io/async-book/04_pinning/01_chapter...