cellsHidden

Initial per-cell visibility baseline for every cell in this column, parsed from the cellsHidden JSON property; defaults to false (shown).

This is distinct from hidden: hidden removes the whole column from the UI, so it can never serve as a per-cell baseline. cellsHidden is the baseline that cellVisibilityLogic falls back to when a row's conditions are not met - letting a show action start cells hidden and reveal them per-row without hiding the column.