code: public void prepareDialogInstance() {
          final LmlParser parser = interfaceService.getParser();
          if (actionContainer != null) {
              parser.getData().addActionContainer(getId(), actionContainer);
          }
          dialog = (Window) parser.createView(wrappedObject, Gdx.files.internal(dialogData.value())).first();
          if (actionContainer != null) {
              parser.getData().removeActionContainer(getId());
          }
      }
docs: Creates instance of the managed dialog actor.