Flattens every cell row across the whole tree in render order (each leaf's body + every level's foot) — used to compute a single set of column widths across every segment (keeps column lines aligned across the whole table)
Flattens every cell row across the whole tree in render order (each leaf's body + every level's foot) — used to compute a single set of column widths across every segment (keeps column lines aligned across the whole table)