I am just confused with some of the terminology used. 
If I have a BoxView(for example), what are the child views of the BoxView? 
If I had a BoxView would child views be (ParagraphView, TableView, 
WrappedPlainView)? If so are there child views for ParagraphView? I 
understand that a BoxView is to arrange its children a horizontal or 
vertical line depending on the axis passed to its constructor, but I dont 
understand what the children are. I have even seen some terminology like 
grandchildren of a View, I still dont understand. Also, what are
orphans of a View, and widows of a View? Thank You very Much.