Design Studio : How can I expand all hierarchy at once in dimension filter

Dear Colleagues.

I am currently working on design studio. I need your advises to implement BW hierarchies in my dashboard.

Is it possible to expand all hierarchy in Dimension Filter of Design Studio?

I tried to expand hierarchy in data source api, like 'expandNode' or 'setDrillLevel'.

These functions can be expanded all hierarchy in Cross tab. but it can not be applied to Dimension Filter.

Please help me to achieve this.

Thank you in advance.

Best Regards,

K.Min