    # File lib/prawn/text/box.rb, line 203
          def height
            return 0 if @baseline_y.nil? || @descender.nil?
            # baseline is already pushed down one line below the current
            # line, so we need to subtract line line_height and leading,
            # but we need to add in the descender since baseline is
            # above the descender
            @baseline_y.abs + @descender - @line_height - @leading
          end