{"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
                    let arg_ty = args[0].node.ty(self.body, self.tcx);
                if self.tcx.is_diagnostic_item(sym::transmute, def_id) {
                    for inner_ty in arg_ty.walk().filter_map(|arg| arg.as_type()) {