wxGBSizerItem - Functions for wxGBSizerItem class
The wxGBSizerItem class is used by the wxGridBagSizer for tracking
the items in the sizer. It adds grid position and spanning information to the
normal wxSizerItem by adding wxGBPosition (not implemented in
wx) and wxGBSpan (not implemented in wx) attributes. Most of the time
you will not need to use a wxGBSizerItem directly in your code, but
there are a couple of cases where it is handy.
This class is derived (and can use functions) from:
wxSizerItem
wxWidgets docs: wxGBSizerItem
wxGBSizerItem() = wx:wx_object()