LayoutContext
BLayoutContext* LayoutContext() const;
BLayoutContext* LayoutContext() const;
if (fTarget && fTarget->LayoutContext())
fVLayouter->Layout(size.height, this, fLayout->LayoutContext());
BLayoutContext* context = fLayout->LayoutContext();
fLayoutData->fLayout->_LayoutWithinContext(false, LayoutContext());
BLayoutContext* context = LayoutContext();
BLayoutContext* context = LayoutContext();