}
    }

    public void sampler(String name, ConditionOptionCall<SamplerAggregationBuilder> opLambda, OperatorCall<BsRoleCA> aggsLambda) {
        SamplerAggregationBuilder builder = regSamplerA(name);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            RoleCA ca = new RoleCA();
            aggsLambda.callback(ca);