Serialization and deserialization support provided by the compiler in the form
of `derive(RustcEncodable, RustcDecodable)`.
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[Documentation](https://doc.rust-lang.org/rustc-serialize)
Add this to your `Cargo.toml`:
```toml
[dependencies]
rustc-serialize = "0.3"
```
and this to your crate root:
```rust
extern crate rustc_serialize;
```