code: def pop_cell(self, idy=None, idx=None, tags=False):
          
          idy = idy if idy is not None else len(self.body) - 1
          idx = idx if idx is not None else len(self.body[idy]) - 1
          cell = self.body[idy].pop(idx)
          return cell if tags else cell.childs[0]
docs: Pops a cell, default the last of the last row