{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"|`to_`"}]}
|`to_`  | `_mut`     |`&mut self`                    | any          |
|`is_`  | none       |`&mut self` or `&self` or none | any          |
|`to_`  | not `_mut` |`self`                         | `Copy`       |