cleanup to InvocationExpression AST declaration

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/token.dart';
@@ skipping 6112 matching lines @@
   void visitChildren(AstVisitor visitor) {}
 }
 
 /**
  * Common base class for [FunctionExpressionInvocationImpl] and
  * [MethodInvocationImpl].
  */
 abstract class InvocationExpressionImpl extends ExpressionImpl
     implements InvocationExpression {
   /**
+   * The list of arguments to the function.
+   */
+  ArgumentList _argumentList;
+
+  /**
    * The type arguments to be applied to the method being invoked, or `null` if
    * no type arguments were provided.
    */
   TypeArgumentList _typeArguments;
 
-  /**
-   * The list of arguments to the function.
-   */
-  ArgumentList _argumentList;
-
   @override
   DartType propagatedInvokeType;
 
   @override
   DartType staticInvokeType;
 
   /**
    * Initialize a newly created invocation.
    */
   InvocationExpressionImpl(
@@ skipping 4662 matching lines @@
   }
 
   @override
   accept(AstVisitor visitor) => visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _safelyVisitChild(_expression, visitor);
   }
 }