<Widget> boilerplate for Flutter `children:` suggestions.

pkg/analysis_server/lib/src/services/completion/dart/utilities.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * A collection of utility methods used by completion contributors.
  */
 import 'package:analysis_server/plugin/protocol/protocol.dart' as protocol
     show Element, ElementKind;
 import 'package:analysis_server/src/ide_options.dart';
@@ skipping 62 matching lines @@
 
   //TODO(pq): generalize and unify with _getDefaultValue
   if (options?.generateFlutterWidgetChildrenBoilerPlate == true) {
     if (element is ConstructorElement) {
       ConstructorElement constructorElement = element;
       ClassElement classElement = constructorElement.enclosingElement;
       if (isFlutterWidget(classElement)) {
         for (ParameterElement param in constructorElement.parameters) {
           if (param.name == 'children') {
             DartType type = param.type;
-            if (type is InterfaceType && _isDartList(type)) {
+            if (type is InterfaceType && isDartList(type)) {
               InterfaceType interfaceType = type;
               List<DartType> typeArguments = interfaceType.typeArguments;
               if (typeArguments.length == 1) {
                 if (sb.isNotEmpty) {
                   sb.write(', ');
                 }
                 offset = sb.length;
                 sb.write('children: <${typeArguments.first.name}>[]');
               }
             }
@@ skipping 83 matching lines @@
     if (classId != null) {
       String className = classId.name;
       if (className != null && className.length > 0) {
         suggestion.declaringType = className;
       }
     }
   }
   return suggestion;
 }
 
+bool isDartList(DartType type) {
+  ClassElement element = type.element;
+  if (element != null) {
+    return element.name == "List" && element.library.isDartCore;
+  }
+  return false;
+}
+
 /**
  * Return `true` if the @deprecated annotation is present on the given [node].
  */
 bool isDeprecated(AnnotatedNode node) {
   if (node != null) {
     NodeList<Annotation> metadata = node.metadata;
     if (metadata != null) {
       return metadata.any((Annotation a) {
         return a.name is SimpleIdentifier && a.name.name == 'deprecated';
       });
@@ skipping 26 matching lines @@
       //TODO (danrubel) include type arguments
     }
     return name;
   } else if (type is GenericFunctionType) {
     // TODO(brianwilkerson) Implement this.
   }
   return DYNAMIC;
 }
 
 String _getDefaultValue(ParameterElement param) => 'null';
-
-bool _isDartList(DartType type) {
-  ClassElement element = type.element;
-  if (element != null) {
-    return element.name == "List" && element.library.isDartCore;
-  }
-  return false;
-}