futures-sink-preview 0.3.0-alpha.3

The asynchronous `Sink` trait for the futures-rs library.
docs.rs failed to build futures-sink-preview-0.3.0-alpha.3
Please check the build logs for more information.
See Builds for ideas on how to fix a failed build, or Metadata for how to configure docs.rs builds.
If you believe this is docs.rs' fault, open an issue.
Visit the last successful build: futures-sink-preview-0.3.0-alpha.19