public class MyDslSerializer extends Serializer {

   private boolean updatedFormatter2Provider = false; 

   /*
    * - Set formatter2Provider to null by using reflection
    */
   private void nullifyFormatter2Provider() {
      if (!updatedFormatter2Provider) {
         try {
            Field field = Serializer.class.getDeclaredField("formatter2Provider");
            field.setAccessible(true);
            field.set(this, null);
            updatedFormatter2Provider = true;
         } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
         }
      }
   }

   @Override
   public String serialize(EObject obj, SaveOptions options) {
      nullifyFormatter2Provider();
      return super.serialize(obj, options);
   }

   @Override
   public void serialize(EObject obj, Writer writer, SaveOptions options) throws IOException {
      nullifyFormatter2Provider();
      super.serialize(obj, writer, options);
   }
}