Make certain generated constructor parameters optional.

pkg/analysis_server/lib/src/generated_protocol.dart

 // Copyright (c) 2014, 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/spec/generate_files".
 
 part of protocol2;
 
@@ skipping 8176 matching lines @@
   /**
    * The file containing the code to be modified.
    */
   String file;
 
   /**
    * A list of the edits used to effect the change.
    */
   List<SourceEdit> edits;
 
-  SourceFileEdit(this.file, this.edits);
+  SourceFileEdit(this.file, {this.edits}) {
+    if (edits == null) {
+      edits = <SourceEdit>[];
+    }
+  }
 
   factory SourceFileEdit.fromJson(JsonDecoder jsonDecoder, String jsonPath, Object json) {
     if (json == null) {
       json = {};
     }
     if (json is Map) {
       String file;
       if (json.containsKey("file")) {
         file = jsonDecoder._decodeString(jsonPath + ".file", json["file"]);
       } else {
         throw jsonDecoder.missingKey(jsonPath, "file");
       }
       List<SourceEdit> edits;
       if (json.containsKey("edits")) {
         edits = jsonDecoder._decodeList(jsonPath + ".edits", json["edits"], (String jsonPath, Object json) => new SourceEdit.fromJson(jsonDecoder, jsonPath, json));
       } else {
         throw jsonDecoder.missingKey(jsonPath, "edits");
       }
-      return new SourceFileEdit(file, edits);
+      return new SourceFileEdit(file, edits: edits);
     } else {
       throw jsonDecoder.mismatch(jsonPath, "SourceFileEdit");
     }
   }
 
   Map<String, dynamic> toJson() {
     Map<String, dynamic> result = {};
     result["file"] = file;
     result["edits"] = edits.map((SourceEdit value) => value.toJson()).toList();
     return result;
@@ skipping 84 matching lines @@
    */
   List<int> mixins;
 
   /**
    * The indexes of the items representing the subtypes of this class. The list
    * will be empty if there are no subtypes or if this item represents a
    * supertype of the pivot type.
    */
   List<int> subclasses;
 
-  TypeHierarchyItem(this.classElement, this.interfaces, this.mixins, this.subclasses, {this.displayName, this.memberElement, this.superclass});
+  TypeHierarchyItem(this.classElement, {this.displayName, this.memberElement, this.superclass, this.interfaces, this.mixins, this.subclasses}) {
+    if (interfaces == null) {
+      interfaces = <int>[];
+    }
+    if (mixins == null) {
+      mixins = <int>[];
+    }
+    if (subclasses == null) {
+      subclasses = <int>[];
+    }
+  }
 
   factory TypeHierarchyItem.fromJson(JsonDecoder jsonDecoder, String jsonPath, Object json) {
     if (json == null) {
       json = {};
     }
     if (json is Map) {
       Element classElement;
       if (json.containsKey("classElement")) {
         classElement = new Element.fromJson(jsonDecoder, jsonPath + ".classElement", json["classElement"]);
       } else {
@@ skipping 22 matching lines @@
         mixins = jsonDecoder._decodeList(jsonPath + ".mixins", json["mixins"], jsonDecoder._decodeInt);
       } else {
         throw jsonDecoder.missingKey(jsonPath, "mixins");
       }
       List<int> subclasses;
       if (json.containsKey("subclasses")) {
         subclasses = jsonDecoder._decodeList(jsonPath + ".subclasses", json["subclasses"], jsonDecoder._decodeInt);
       } else {
         throw jsonDecoder.missingKey(jsonPath, "subclasses");
       }
-      return new TypeHierarchyItem(classElement, interfaces, mixins, subclasses, displayName: displayName, memberElement: memberElement, superclass: superclass);
+      return new TypeHierarchyItem(classElement, displayName: displayName, memberElement: memberElement, superclass: superclass, interfaces: interfaces, mixins: mixins, subclasses: subclasses);
     } else {
       throw jsonDecoder.mismatch(jsonPath, "TypeHierarchyItem");
     }
   }
 
   Map<String, dynamic> toJson() {
     Map<String, dynamic> result = {};
     result["classElement"] = classElement.toJson();
     if (displayName != null) {
       result["displayName"] = displayName;
@@ skipping 749 matching lines @@
     return false;
   }
 
   @override
   int get hashCode {
     int hash = 0;
     hash = _JenkinsSmiHash.combine(hash, newName.hashCode);
     return _JenkinsSmiHash.finish(hash);
   }
 }