A Box is a conceptual object that can appear on a page. It is an extension
of an Element and provides methods that allow a Box to draw
itself and support connections to other boxes.
Implementors should directly implement this interface or one of its
implementations. DecoratorBox in particular.
author: Richard Gould since: 0.3 See Also:Element
Gets the object responsible for drawing the preview and printing the contents of this box.
Gets the object responsible for drawing the preview and printing the contents of this box.