class Prawn::Table::Cell

content are all drawn in correct order so as not to overlap.
Cell.draw_cells, which ensures that the backgrounds, borders, and
If drawing a group of cells at known positions, look into

location at which the cell is drawn.
Draws the cell onto the document. Pass in a point [x,y] to override the

def draw(pt=[x, y])
  Prawn::Table::Cell.draw_cells([[self, pt]])
end