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//@check-pass
pub struct Key;
#[derive(Clone)]
pub struct Value;
use std::collections::HashMap;
pub struct DiagnosticBuilder<'db> {
inner: HashMap<&'db Key, Vec<&'db Value>>,
}
impl<'db> DiagnosticBuilder<'db> {
pub fn iter<'a>(&'a self) -> impl Iterator<Item = (&'db Key, impl Iterator<Item = &'a Value>)> {
self.inner.iter().map(|(key, values)| (*key, values.iter().map(|v| *v)))
}
}
fn main() {}
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