format method
Implementation
@override
LayoutFormat format(
double containerWidth, [
double containerHeight = double.maxFinite,
]) {
final horizontalMargin = leftMargin(containerWidth);
return LayoutFormat(
columns: columns(containerWidth),
gutter: gutter(containerWidth),
leftMargin: horizontalMargin,
topMargin: 0,
rightMargin: horizontalMargin,
bottomMargin: 0,
);
}