Dimension const & dim0 = cell(0).dimension(*mi.base.bv);
Dimension const & dim1 = cell(1).dimension(*mi.base.bv);
dim.asc = max(dim0.ascent() + 2, dim0.ascent() + dim1.ascent()) + 2 + 8;
Dimension const & dim0 = cell(0).dimension(*mi.base.bv);
Dimension const & dim1 = cell(1).dimension(*mi.base.bv);
dim.asc = max(dim0.ascent() + 2, dim0.ascent() + dim1.ascent()) + 2 + 8;