docs: def friend_addRow(self, rowNum, row):
                  """used only by parser: adds a row of columns"""
                  self[rowNum] = row
                  if (rowNum > self.maxRow):
                          self.maxRow = rowNum
  
                  for cellNum in row.keys():
                          if cellNum > self.maxColumn:
                                  self.maxColumn = cellNum
  
                  return row.friend_Finalize()