The flex factor to apply to the cell if there is any room left
over when laying out the table. The remaining space is
distributed to any columns with flex in proportion to their flex
value (higher values get more space).
The ideal width that the column should have. This must be equal
to or greater than the minIntrinsicWidth. The column might be
bigger than this width, e.g. if the column is flexible or if the
table's width ends up being forced to be bigger than the sum of
all the maxIntrinsicWidth values.