84                     self.t.get_unchecked(i),  in next()
85                     self.u.get_unchecked(i)))  in next()
110                     self.t.get_unchecked(i),  in next_back()
111                     self.u.get_unchecked(i)))  in next_back()
132     unsafe fn get_unchecked(&mut self, i: usize) -> Self::Item {  in get_unchecked()  function
133         (self.t.get_unchecked(i),  in get_unchecked()
134          self.u.get_unchecked(i))  in get_unchecked()
149     unsafe fn get_unchecked(&mut self, i: usize) -> Self::Item;  in get_unchecked()  method
157     unsafe fn get_unchecked(&mut self, i: usize) -> &'a T {  in get_unchecked()  method
159         (**self).get_unchecked(i)  in get_unchecked()
168     unsafe fn get_unchecked(&mut self, i: usize) -> &'a mut T {  in get_unchecked()  method