wrapperOuter method
Implementation
String? wrapperOuter(String? child) {
if (child == null) return null;
if (!hasOuter) return child;
final code = CodeConstrutor("SafeArea")
..add("top", _ot.toString())
..add("bottom", _ob.toString())
..add("left", _ol.toString())
..add("right", _or.toString())
..add("child", child);
return code.generate();
}