anchor.diff:          oz_worker_gui_is_set_up_after_startup,
           oz_panel_gui_setup_works,
           default_harvester_gui_is_automatically_linked,
  +        default_harvester_gui_is_updated_on_deployment,
           empty_gui_is_linked_after_provider_registration,
           op_worker_and_panel_gui_is_linked_upon_version_info_update,
           gui_is_unlinked_after_provider_deletion,
  
positive.code:     ?assert(link_exists(Config, <<"./hrv/", HarvesterId/binary>>, <<"default">>)),
      ?assert(file_is_served(Config, HrvIndexContent, [<<"/hrv/">>, HarvesterId, <<"/i">>])),
      ?assert(file_is_served(Config, HrvIndexContent, [<<"/hrv/">>, HarvesterId, <<"/index.html">>])).
  
  
  empty_gui_is_linked_after_provider_registration(Config) ->
  
negative.code:     oz_worker_gui_is_set_up_after_startup/1,
      oz_panel_gui_setup_works/1,
      default_harvester_gui_is_automatically_linked/1,
      default_harvester_gui_is_updated_on_deployment/1,
      empty_gui_is_linked_after_provider_registration/1,
      op_worker_and_panel_gui_is_linked_upon_version_info_update/1,
      gui_is_unlinked_after_provider_deletion/1,
  