Add an AST factory method for fieldDeclaration with all optional named parameters.

pkg/analyzer/lib/src/dart/ast/ast.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.
 
 library analyzer.src.dart.ast.ast;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/syntactic_entity.dart';
@@ skipping 4307 matching lines @@
 /**
  * The declaration of one or more fields of the same type.
  *
  *    fieldDeclaration ::=
  *        'static'? [VariableDeclarationList] ';'
  */
 class FieldDeclarationImpl extends ClassMemberImpl implements FieldDeclaration {
   /**
    * The 'covariant' keyword, or `null` if the keyword was not used.
    */
+  @override
   Token covariantKeyword;
 
   /**
    * The token representing the 'static' keyword, or `null` if the fields are
    * not static.
    */
   @override
   Token staticKeyword;
 
   /**
    * The fields being declared.
    */
   VariableDeclarationList _fieldList;
 
   /**
    * The semicolon terminating the declaration.
    */
   @override
   Token semicolon;
 
   /**
    * Initialize a newly created field declaration. Either or both of the
    * [comment] and [metadata] can be `null` if the declaration does not have the
    * corresponding attribute. The [staticKeyword] can be `null` if the field is
    * not a static field.
    */
-  FieldDeclarationImpl(CommentImpl comment, List<Annotation> metadata,
-      this.staticKeyword, VariableDeclarationListImpl fieldList, this.semicolon)
+  FieldDeclarationImpl(
+      CommentImpl comment,
+      List<Annotation> metadata,
+      this.covariantKeyword,
+      this.staticKeyword,
+      VariableDeclarationListImpl fieldList,
+      this.semicolon)
       : super(comment, metadata) {
     _fieldList = _becomeParentOf(fieldList);
   }
 
   @override
   Iterable<SyntacticEntity> get childEntities =>
       super._childEntities..add(staticKeyword)..add(_fieldList)..add(semicolon);
 
   @override
   Element get element => null;
@@ skipping 7109 matching lines @@
 
   @override
   dynamic/*=E*/ accept/*<E>*/(AstVisitor/*<E>*/ visitor) =>
       visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _expression?.accept(visitor);
   }
 }