createUpdateAddHorizontal method
Implementation
List<NamedLine> createUpdateAddHorizontal(String name, List<NamedLine> Function() updateAdd){
return horizontalLines.update(name, (old)=>[ ...old, ...updateAdd()], ifAbsent: updateAdd);
}
List<NamedLine> createUpdateAddHorizontal(String name, List<NamedLine> Function() updateAdd){
return horizontalLines.update(name, (old)=>[ ...old, ...updateAdd()], ifAbsent: updateAdd);
}