'Tabs within tabs in R Flexdashboard?

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Hi, Is it possible to have tabs within tabs on Flexdashboards? I have a page called "Sector Emissions" that has multiple tabs for different "Sectors". I want to be able to have tabs in each sector tab so that I can show different charts for that sector by flicking between the 2 tabs. EG, under the 'Business' tab I want to have 2 tabs the user can select.



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