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% Traits
<small>There is a new edition of the book and this is an old link.</small>
> Traits abstract over behavior that types can have in common.
```rust
pub trait Summarizable {
fn summary(&self) -> String;
}
```
---
Here are the relevant sections in the new and old books:
* **[in the current edition: Ch 10.02 — Traits][2]**
* [in the current edition: Ch 19.03 — Advanced Traits][3]
* <small>[In the first edition: Ch 3.19 — Traits][1]</small>
[1]: https://doc.rust-lang.org/1.30.0/book/first-edition/traits.html
[2]: ch10-02-traits.html
[3]: ch19-03-advanced-traits.html
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