<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_tr(self):
 """Returns the top right border of the cell"""


        cell_above = CellBorders(self.cell_attributes,
                                 *self.cell.get_above_key_rect())
        return cell_above.get_r()