adding packages

deprecated/storyboard/lib/src/custom_rect_clipper.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class CustomRect extends CustomClipper<Rect> {
+  final Offset offset;
+
+  CustomRect(this.offset);
+  @override
+  Rect getClip(Size size) {
+    return Rect.fromLTWH(
+      offset.dx,
+      offset.dy,
+      size.width,
+      size.height,
+    );
+  }
+
+  @override
+  bool shouldReclip(CustomRect oldClipper) {
+    return true;
+  }
+}