insertGap function
Implementation
List<Widget> insertGap({required List<Widget> list, Widget? gap}) {
List<Widget> retVal = [];
for (int i = 0; i < list.length; i++) {
retVal.add(list[i]);
if (i < list.length - 1) {
retVal.add(gap ?? const SizedBox());
}
}
return retVal;
}