{"ast_node_type":"impl","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//!"}]}
//!      impl into scope while visiting the impl-items, and then back out again.
//!    - Example: Lifetime resolution, which wants to bring lifetimes declared on the
//!    - How: Implement `intravisit::Visitor` and override the `NestedFilter` type to