18     type Checkpoint: Clone;  typedef
25     fn checkpoint(&self) -> Self::Checkpoint;  in checkpoint()
26     fn reset(&mut self, checkpoint: Self::Checkpoint);  in reset()
160     type Checkpoint = T::Checkpoint;  typedef
173     fn checkpoint(&self) -> Self::Checkpoint {  in checkpoint()
178     fn reset(&mut self, checkpoint: Self::Checkpoint) {  in reset()
205     type Checkpoint = Self;  typedef
218     fn checkpoint(&self) -> Self::Checkpoint {  in checkpoint()
223     fn reset(&mut self, checkpoint: Self::Checkpoint) {  in reset()
277     type Checkpoint = Self;  typedef
294     fn checkpoint(&self) -> Self::Checkpoint {  in checkpoint()
299     fn reset(&mut self, checkpoint: Self::Checkpoint) {  in reset()
306     type Checkpoint = Self;  typedef
323     fn checkpoint(&self) -> Self::Checkpoint {  in checkpoint()
328     fn reset(&mut self, checkpoint: Self::Checkpoint) {  in reset()
411     type Checkpoint = Stream<Input::Checkpoint, X::Checkpoint>;  typedef
412     fn checkpoint(&self) -> Self::Checkpoint {  in checkpoint()