syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"self.var_values.iter().enumerate().all(|(bv,"}]}
source_snippet:         self.var_values.iter().enumerate().all(|(bv, arg)| match arg.kind() {
context_before:     pub fn is_identity(&self) -> bool {
context_after:             ty::GenericArgKind::Lifetime(r) => {