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use crate::def_sorted_vec; /// Example key #[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Copy)] pub struct K; /// Example value pub struct T { key: K, } fn key(t: &T) -> K { t.key } def_sorted_vec! { /// Sorted vector type that provides quick access to `T`s through `K`s. pub struct ExampleSortedVec: T => K, key }