| /// "Signaling" trait used in impl trait to tag lifetimes that you may | |
| /// need to capture but don't really need for other reasons. | |
| /// Basically a workaround; see [this comment] for details. | |
| /// | |
| /// [this comment]: https://github.com/rust-lang/rust/issues/34511#issuecomment-373423999 | |
| pub trait Captures<'a> {} | |
| impl<'a, T: ?Sized> Captures<'a> for T {} |