syntax_data: {"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let local_id = self.var_local_id(binding.var_id, RefWithinGuard);
context_before:             for binding in by_value_bindings.clone() {
context_after:                 let cause = FakeReadCause::ForGuardBinding;