assertEquals(subreq, request.getCommonHeader().getSubRequestId());
// repeat using a null payload
params = params.toBuilder().payload(null).build();
oper = new MyOper(params, config);
assertEquals(subreq, request.getCommonHeader().getSubRequestId());
// repeat using a null payload
params = params.toBuilder().payload(null).build();
oper = new MyOper(params, config);