Trait MapWithDefault
cranelift_codegen_meta::default_map
pub(crate) trait MapWithDefault<K, V: Default> { fn get_or_default(&mut self, k: K) -> &mut V; }
fn get_or_default(&mut self, k: K) -> &mut V
impl<K: Eq + Hash, V: Default> MapWithDefault<K, V> for HashMap<K, V>