columnWidth method
Implementation
double columnWidth(double containerWidth) {
_assertContainerWidth(containerWidth);
final bodyWidth = this.bodyWidth(containerWidth);
if (bodyWidth > 0) {
final totalGutterWidth = (columns - 1) * gutter;
return bodyWidth > totalGutterWidth
? (bodyWidth - totalGutterWidth) / columns
: 0;
}
return 0;
}