+ @style{wxRIBBON_PANEL_STRETCH}
+ Stretches a single panel to fit the parent page.
+ @style{wxRIBBON_PANEL_FLEXIBLE}
+ Allows the panel to size in both directions; currently only useful
+ when a single wxRibbonToolBar is the child of the panel, particularly
+ in vertical orientation where the number of rows is dependent on the
+ amount of horizontal space available. Set the minimum and maximum
+ toolbar rows to take full advantage of this wrapping behaviour.