private void updateOutputVariables() {
    final StringBuilder builder = new StringBuilder();
    boolean first = true;
    for (String variable : myOutputVariables) {
      if (myVariablesMap!=null){
        final AbstractVariableData data = myVariablesMap.get(variable);
        final String outputName = data != null ? data.getName() : variable;
        if (first){
          first = false;
        } else {
          builder.append(", ");
        }
        builder.append(outputName);
      }
    }
    myOutputVariablesTextArea.setText(builder.length() > 0 ? builder.toString() : RefactoringBundle.message("refactoring.extract.method.dialog.empty"));
  }
private void updateOutputVariables()