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/// Utility mixins for Iterables. Designed to be imported with 'using'.
pub struct Iterable;

pub struct Iterables {}

impl Iterables {
    // /// Searches for the first element using a predicate and returns it.
    // // static
    // pub fn find<A>(&self, it: Iterable<A>, pred: impl Fn(A) -> bool) -> A {
    //     for a in it {
    //         if pred(a) {
    //             return a;
    //         }
    //     }
    //     return None;
    // }
}