anchor.diff:    }
   
     visitLabeledStatement(LabeledStatement node) {
  -    writeNode(node.body); // TODO
  +    writeIndentation();
  +    writeWord(syntheticNames.nameLabeledStatement(node));
  +    endLine(':');
  +    writeNode(node.body);
     }
   
     visitBreakStatement(BreakStatement node) {
       writeIndentation();
  -    writeWord('break'); // TODO
  +    writeWord('break');
  +    writeWord(syntheticNames.nameLabeledStatement(node.target));
       endLine(';');
     }
   
  
positive.code:   }
  
    visitSwitchCase(SwitchCase node) {
      for (var expression in node.expressions) {
        writeIndentation();
        writeWord('case');
  
negative.code: 
    visitContinueSwitchStatement(ContinueSwitchStatement node) {
      writeIndentation();
      writeWord('continue');
      writeWord(syntheticNames.nameSwitchCase(node.target));
      endLine(';');
    }
  
  