Prevent UIWizards from being merged into dialogs

When I add multiple UICommand and UIWizard instances to create a single dialog page, like so:

      NavigationResultBuilder builder = NavigationResultBuilder.create();
      builder.add(getMetadata(uiContext), setupFlow);
      return builder.build();

the wizard pages are also added to the dialog page. This results in erroneous behavior since only the first page of the wizard is added and displayed. The second and subsequent pages of a wizard are omitted (even from execution).

Since it is obvious that the next page in a wizard cannot be determined statically, and should determined at runtime, we must prevent wizards from being merged into a single page.