Clean imports, make onElementCreated a tear-off

Author: ditman

packages/pointer_interceptor/pointer_interceptor_web/example/integration_test/widget_test.dart

@@ -8,9 +8,7 @@
 import 'package:flutter/src/widgets/framework.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
-
 import 'package:pointer_interceptor_web_example/main.dart' as app;
-
 import 'package:web/web.dart' as web;
 
 final Finder nonClickableButtonFinder =

packages/pointer_interceptor/pointer_interceptor_web/example/lib/main.dart

@@ -8,7 +8,6 @@ import 'dart:ui_web' as ui_web;
 import 'package:flutter/material.dart';
 import 'package:pointer_interceptor_platform_interface/pointer_interceptor_platform_interface.dart';
 import 'package:pointer_interceptor_web/pointer_interceptor_web.dart';
-
 import 'package:web/web.dart' as web;
 
 const String _htmlElementViewType = '_htmlElementViewType';

packages/pointer_interceptor/pointer_interceptor_web/lib/pointer_interceptor_web.dart

@@ -4,9 +4,7 @@
 
 import 'package:flutter/widgets.dart';
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
-
 import 'package:pointer_interceptor_platform_interface/pointer_interceptor_platform_interface.dart';
-
 import 'package:web/web.dart' as web;
 
 /// The web implementation of the `PointerInterceptor` widget.
@@ -18,6 +16,11 @@ class PointerInterceptorWeb extends PointerInterceptorPlatform {
     PointerInterceptorPlatform.instance = PointerInterceptorWeb();
   }
 
+  // Slightly modify the created `element` (for `debug` mode).
+  void _onElementCreated(Object element) {
+    (element as web.HTMLElement).style.backgroundColor = 'rgba(255, 0, 0, .5)';
+  }
+
   @override
   Widget buildWidget({
     required Widget child,
@@ -35,12 +38,7 @@ class PointerInterceptorWeb extends PointerInterceptorPlatform {
           child: HtmlElementView.fromTagName(
             tagName: 'div',
             isVisible: false,
-            onElementCreated: debug
-                ? (Object element) {
-                    element as web.HTMLElement;
-                    element.style.backgroundColor = 'rgba(255, 0, 0, .5)';
-                  }
-                : null,
+            onElementCreated: debug ? _onElementCreated : null,
           ),
         ),
         child,