Deprecate ToSourceVisitor

pkg/analyzer/lib/src/generated/java_core.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.generated.java_core;
 
 /**
  * Inserts the given arguments into [pattern].
  *
  *     format('Hello, {0}!', 'John') = 'Hello, John!'
@@ skipping 120 matching lines @@
   final String name;
 
   /// The position in the enum declaration.
   final int ordinal;
   const Enum(this.name, this.ordinal);
   int get hashCode => ordinal;
   int compareTo(E other) => ordinal - other.ordinal;
   String toString() => name;
 }
 
+@deprecated
 class PrintStringWriter extends PrintWriter {
   final StringBuffer _sb = new StringBuffer();
 
   void print(x) {
     _sb.write(x);
   }
 
   String toString() => _sb.toString();
 }
 
 abstract class PrintWriter {
   void newLine() {
     this.print('\n');
   }
 
   void print(x);
 
   void printf(String fmt, List args) {
     this.print(_printf(fmt, args));
   }
 
   void println(String s) {
     this.print(s);
     this.newLine();
   }
 }