fix sorting of compilation unit members - related to #23947

pkg/analyzer/lib/src/generated/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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.ast;
 
 import 'dart:collection';
@@ skipping 2712 matching lines @@
   static const List<AstNode> EMPTY_LIST = const <AstNode>[];
 
   /**
    * A comparator that can be used to sort AST nodes in lexical order. In other
    * words, `compare` will return a negative value if the offset of the first
    * node is less than the offset of the second node, zero (0) if the nodes have
    * the same offset, and a positive value if the offset of the first node is
    * greater than the offset of the second node.
    */
   static Comparator<AstNode> LEXICAL_ORDER =
-      (AstNode first, AstNode second) => second.offset - first.offset;
+      (AstNode first, AstNode second) => first.offset - second.offset;
 
   /**
    * The parent of the node, or `null` if the node is the root of an AST
    * structure.
    */
   AstNode _parent;
 
   /**
    * A table mapping the names of properties to their values, or `null` if this
    * node does not have any properties associated with it.
@@ skipping 17453 matching lines @@
   }
 
   @override
   accept(AstVisitor visitor) => visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _safelyVisitChild(_expression, visitor);
   }
 }