fix export at root

lib/src/wrap.dart

@@ -0,0 +1,34 @@
+import 'package:flutter/widgets.dart';
+
+/// An encapsulation of [Builder], also used as an alias.
+Widget builder(Widget Function(BuildContext context) builder) =>
+    Builder(builder: builder);
+
+extension WrapMedia on Widget {
+  Widget wrapMedia(MediaQueryData data) => MediaQuery(data: data, child: this);
+
+  /// Ensure that the inner widget can get [MediaQueryData] from the context.
+  /// If there's no available [MediaQueryData], it will get from the [View].
+  Widget ensureMedia(BuildContext context) {
+    final media = MediaQuery.maybeOf(context);
+    return media == null
+        ? wrapMedia(MediaQueryData.fromView(View.of(context)))
+        : this;
+  }
+}
+
+extension WrapDirection on Widget {
+  Widget wrapDirection(TextDirection direction) =>
+      Directionality(textDirection: direction, child: this);
+
+  /// Ensure that the inner widget can get [TextDirection] from the context.
+  /// You can specify the [defaultValue]
+  /// if you prefer [TextDirection.rtl] as default.
+  Widget ensureDirection(
+    BuildContext context, {
+    TextDirection defaultValue = TextDirection.ltr,
+  }) {
+    final direction = Directionality.maybeOf(context);
+    return direction == null ? wrapDirection(defaultValue) : this;
+  }
+}

test/wrap_test.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:modifier/src/wrap.dart';
+import 'package:modifier/modifier.dart';
 
 void main() {
   testWidgets('enable text', (t) async {