53     Ascii(&'a MetadataKey<Ascii>, &'a MetadataValue<Ascii>),  enumerator
63     Ascii(&'a MetadataKey<Ascii>, &'a mut MetadataValue<Ascii>),  enumerator
98     Ascii(&'a MetadataKey<Ascii>),  enumerator
119     Ascii(&'a MetadataValue<Ascii>),  enumerator
139     Ascii(&'a mut MetadataValue<Ascii>),  enumerator
454     pub fn get<K>(&self, key: K) -> Option<&MetadataValue<Ascii>>  in get()
528     pub fn get_mut<K>(&mut self, key: K) -> Option<&mut MetadataValue<Ascii>>  in get_mut()
610         K: AsMetadataKey<Ascii>,  in get_all()
883     pub fn entry<K>(&mut self, key: K) -> Result<Entry<'_, Ascii>, InvalidMetadataKey>  in entry()  argument
885         K: AsMetadataKey<Ascii>,  in entry()
1001     pub fn insert<K>(&mut self, key: K, val: MetadataValue<Ascii>) -> Option<MetadataValue<Ascii>>  in insert()
1092     pub fn append<K>(&mut self, key: K, value: MetadataValue<Ascii>) -> bool  in append()
1173     pub fn remove<K>(&mut self, key: K) -> Option<MetadataValue<Ascii>>  in remove()
1595     pub fn insert_entry(self, value: MetadataValue<VE>) -> OccupiedEntry<'a, Ascii> {  in insert_entry()  argument