{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
                    let arg5_type = gcc_func.get_param_type(4);
                    // latter has 4 so it doesn't require this additional argument.
                    new_args.push(builder.context.new_rvalue_from_int(arg5_type, 4));