{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"|`is_`"}]}
|`is_`  | none       |`&mut self` or `&self` or none | any          |
|`into_`| none       |`self`                         | any          |
|`to_`  | `_mut`     |`&mut self`                    | any          |