Testing - Tabset
Appearance (default)
Panel A
Panel B
Panel C
Nested Tabset
Panel D
This panel should be open, by default.
Panel D1
This panel should be open, by default.
Panel D2
Panel D3
Panel E
Panel E1
This panel should be open, by default.
Panel E2
Panel E3
Panel F
Panel F1
This panel should be open, by default.