LayoutHeader constructor
Constructs a LayoutHeader widget.
child is the widget to be displayed in the header section.
flexUnits is the number of flex units assigned to the header section.
If not provided, the default flex units for the header
section is used.
Implementation
LayoutHeader(
this.child, {
int? flexUnits,
super.key,
}) : layoutFlexUnits = flexUnits ?? LayoutFlexUnits.header.flexUnits;