{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"vars.entry(self.ir.variable_name(var))"}]}
            vars.entry(self.ir.variable_name(var))
            let id_and_sp = (hir_id, pat_sp, ident.span);
                .and_modify(|(.., hir_ids_and_spans)| hir_ids_and_spans.push(id_and_sp))