
 +----------------------------------------+
 |             top_col_1                  |
 +----------------------------------------+
 |             head_col_1                 |
 +-----------+--------------+-------------+
 |           |              |             |
 | mid_col_1 |  mid_col_2   | mid_col_3   |
 |           |              |             |
 |           +--------------+             |
 |           | bottom_col_1 |             |
 +-----------+--------------+-------------+

