package serialize 
{
  import flash.errors.IllegalOperationError;

  //ABSTRACT Class
  public class CreateSerializer
  {
    public function doStuff():void
    {
      var serializer:SerializerBase = this.factoryMethod();
      serializer.manipulate();
    }

    //ABSTACT Method
    protected function factoryMethod():SerializerBase
    {
      throw new IllegalOperationError("Abstract method: must be overidden in a subclass");
      return null;
    }
  }
}