{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
            let hidden_type = self.resolve(hidden_type, &hidden_type.span);
        for (opaque_type_key, hidden_type) in opaque_types {
            let opaque_type_key = self.resolve(opaque_type_key, &hidden_type.span);