syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"ty::ReBound(index,"}]}
source_snippet:             ty::ReBound(index, br) if index == self.binder_index => {
context_before:         match r.kind() {
context_after:                 let idx = br.var().as_usize();