{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"`deref`/`deref_mut`,"}]}
  `deref`/`deref_mut`, and `add` respectively.
  marked with lang items; those specific four are `eq`, `partial_ord`,
- panicking: the `panic` and `panic_impl` lang items, among others.