92     fn initialize(_: sealed::Internal, _lower: usize, _upper: Option<usize>) {}  in initialize()
94     fn extend(_: sealed::Internal, _collection: &mut (), _item: ()) -> bool {  in extend()
98     fn finalize(_: sealed::Internal, _collection: &mut ()) {}  in finalize()
106     fn initialize(_: sealed::Internal, _lower: usize, _upper: Option<usize>) -> String {  in initialize()
110     fn extend(_: sealed::Internal, collection: &mut String, item: T) -> bool {  in extend()
115     fn finalize(_: sealed::Internal, collection: &mut String) -> String {  in finalize()
125     fn initialize(_: sealed::Internal, lower: usize, _upper: Option<usize>) -> Vec<T> {  in initialize()
129     fn extend(_: sealed::Internal, collection: &mut Vec<T>, item: T) -> bool {  in extend()
134     fn finalize(_: sealed::Internal, collection: &mut Vec<T>) -> Vec<T> {  in finalize()
144     fn initialize(_: sealed::Internal, lower: usize, upper: Option<usize>) -> Vec<T> {  in initialize()
148     fn extend(_: sealed::Internal, collection: &mut Vec<T>, item: T) -> bool {  in extend()
152     fn finalize(_: sealed::Internal, collection: &mut Vec<T>) -> Box<[T]> {  in finalize()
167         _: sealed::Internal,  in initialize()
175         _: sealed::Internal,  in extend()
192     fn finalize(_: sealed::Internal, collection: &mut Self::InternalCollection) -> Result<U, E> {  in finalize()
213             internal: Internal,  in initialize()
221         fn extend(internal: Internal, collection: &mut Self::InternalCollection, item: T) -> bool;  in extend()
224         fn finalize(internal: Internal, collection: &mut Self::InternalCollection) -> Self;  in finalize()
228     pub struct Internal;  struct