{"ast_node_type":"function","tokens":[{"end":71,"kind":"keyword","start":0,"text":"fn"}]}
    fn elided_dyn_bound(&mut self, span: Span) -> &'hir hir::Lifetime {
    /// `Box<dyn Debug + '_>`. In those cases, `lower_lifetime` is invoked.
        let r = hir::Lifetime::new(