Move cursor to the next element and return it. If the cursor reaches the end, return `None` and leave the cursor at the off-the-end position.
(&mut self)
| 237 | /// If the cursor reaches the end, return `None` and leave the cursor at the off-the-end |
| 238 | /// position. |
| 239 | pub fn next(&mut self) -> Option<K> { |
| 240 | self.path.next(self.pool).map(|(k, _)| k) |
| 241 | } |
| 242 | |
| 243 | /// Move cursor to the previous element and return it. |
| 244 | /// |