DrawSplitter
BeControlLook::DrawSplitter(BView* view, BRect& rect, const BRect& updateRect,
FlatControlLook::DrawSplitter(BView* view, BRect& rect, const BRect& updateRect,
HaikuControlLook::DrawSplitter(BView* view, BRect& rect, const BRect& updateRect,
BSplitView::DrawSplitter(BRect frame, const BRect& updateRect,