minIntrinsicWidth method
The smallest width that the column can have.
The cells argument is an iterable that provides all the cells
in the table for this column. Walking the cells is by definition
O(N), so algorithms that do that should be considered expensive.
The containerWidth argument is the maxWidth of the incoming
constraints for the table, and might be infinite.
Implementation
double minIntrinsicWidth(Iterable<RenderBox> cells, double containerWidth);