class Prawn::Table::Cell

def height_ignoring_span


row only.
Returns the cell's height in points, inclusive of padding, in its first 
def height_ignoring_span
  # We can't ||= here because the FP error accumulates on the round-trip
  # from #content_height.
  defined?(@height) && @height || (content_height + padding_top + padding_bottom)
end