syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"ty::ReBound(debruijn,"}]}
source_snippet:             ty::ReBound(debruijn, _) if debruijn < self.current_index => {
context_before:         match r.kind() {
context_after:                 debug!(?self.current_index, "skipped bound region");