# 0.1.18 (April 30, 2010)
### Added
- `Subscriber` impl for `Box<dyn Subscriber + Send + Sync + 'static>`
([#1358])
- `Subscriber` impl for `Arc<dyn Subscriber + Send + Sync + 'static>`
([#1374])
- Symmetric `From` impls for existing `Into` impls on `Current` and
`Option<Id>` ([#1335])
- `Attributes::fields` accessor that returns the set of fields defined
on a span's `Attributes` ([#1331])
Thanks to @Folyd for contributing to this release!
[#1358]: https://github.com/tokio-rs/tracing/pull/1358
[#1374]: https://github.com/tokio-rs/tracing/pull/1374
[#1335]: https://github.com/tokio-rs/tracing/pull/1335
[#1331]: https://github.com/tokio-rs/tracing/pull/1331