class Prawn::Table

def ink_cells(cells_this_page)

Ink all cells on the current page 
def ink_cells(cells_this_page)
  if defined?(@before_rendering_page) && @before_rendering_page
    c = Cells.new(cells_this_page.map { |ci, _| ci })
    @before_rendering_page.call(c)
  end
end