widget description

@@ -3,6 +3,7 @@ import 'package:flutter/widgets.dart';
 import 'screenutil.dart';
 
 class ScreenUtilInit extends StatelessWidget {
+  /// A helper widget that initializes [ScreenUtil]
   const ScreenUtilInit({
     @required this.child,
     this.designSize = ScreenUtil.defaultSize,
@@ -11,7 +12,11 @@ class ScreenUtilInit extends StatelessWidget {
   }) : super(key: key);
 
   final Widget child;
+
+  /// The [Size] of the device in the design draft, in px
   final Size designSize;
+
+  /// Sets whether the font size is scaled according to the system's "font size" assist option
   final bool allowFontScaling;
 
   @override