docs: @Override
      protected Collection<String> loadBundledPlugins() {
          // this is used in tests, when we want to override the default bundled plugins with .jpl (or .hpl) versions
          if (SystemProperties.getString("hudson.bundled.plugins") != null) {
              return Collections.emptySet();
          }
  
          try {
              return loadPluginsFromWar("/WEB-INF/plugins");
          } finally {
              loadDetachedPlugins();
          }
      }