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// check-pass
use std::collections::{BTreeMap, HashMap};
trait Map
where
for<'a> &'a Self: IntoIterator<Item = (&'a Self::Key, &'a Self::Value)>,
{
type Key;
type Value;
}
impl<K, V> Map for HashMap<K, V> {
type Key = K;
type Value = V;
}
impl<K, V> Map for BTreeMap<K, V> {
type Key = K;
type Value = V;
}
fn main() {}
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