draw (Prawn::Table)

    # File lib/prawn/table.rb, line 161
        def draw
          @parent_bounds = @document.bounds
          case C(:position)
          when :center
            x = (@document.bounds.width - width) / 2.0
            dy = @document.bounds.absolute_top - @document.y
            @document.bounding_box [x, @parent_bounds.top], :width => width do
              @document.move_down(dy)
              generate_table
            end
          when Numeric
            x, y = C(:position), @document.y - @document.bounds.absolute_bottom
            @document.bounding_box([x,y], :width => width) { generate_table }
          else
            generate_table
          end
        end