Deprecated (?) mio EventLoop

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Hi,

Digging to this example Rust in Detail: Writing Scalable Chat Service from Scratch and I stumbled with

cargo run
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading mio v0.6.10
   Compiling mio v0.6.10
   Compiling chat v0.1.0 (file:///home/sharlatan/Projects/hack/Rust/chat)
error[E0433]: failed to resolve. Use of undeclared type or module `EventLoop`
  --> src/main.rs:13:26
    |
13 |     let mut event_loop = EventLoop::new().unwrap();
    |                          ^^^^^^^^^ Use of undeclared type or module `EventLoop`

Checked the date of the article, and it's 2015...

Additional question from an iron coder is it tracked some how of deprecated (version) and added (version) functionality in creates and Rust core? Any kind of reference table like

| NAME | ADDED IN VER | REMOVED FROM VER | DESCRIPTION |

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