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操作步骤如下：
1. k8s环境下，consumer端开启mesh模式
2. consumer端需要调用多个provider
3. provider有应用级注册和接口级注册，并且需要的provider不再同一个namespace下
4. 原有项目存在dubbo2.6与3.1多版本间的相互调用，在开启消费端mesh（dubbo3.1）后，无法调用到2.6的服务提供者

**问题：**

1. 如何实现在一个consumer下，调用多个namespace下的provider，并且provider有应用级注册和接口级注册
2. dubbo3.1消费端在开启mesh后，如何调用版本是2.6的服务提供者
}
    public void setCheck(Boolean check) {
        this.check = check;
    }
    public Boolean isInit() {
        return init;
    }
    public void setInit(Boolean init) {
        this.init = init;
    }
    /**
     * @deprecated Replace to {@link AbstractReferenceConfig#getGeneric()}
     */
    @Deprecated
    @Parameter(excluded = true, attribute = false)
    public Boolean isGeneric() {
        return this.generic != null ? ProtocolUtils.isGeneric(generic) : null;
    }
    /**
     * @deprecated Replace to {@link AbstractReferenceConfig#setGeneric(String)}
     */
    @Deprecated
    public void setGeneric(Boolean generic) {
        if (generic != null) {
            this.generic = generic.toString();
        }
    }
    public String getGeneric() {
        return generic;
    }