syntax_data: {"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let local_id = self.var_local_id(var, for_guard);
context_before:     ) {
context_after:         if let Some(region_scope) = self.region_scope_tree.var_scope(var.0.local_id) {