docs: @Exported
      public List<Plugin> getUpdates() {
          Data data = getData();
          if(data==null)      return Collections.emptyList(); // fail to determine
          
          List<Plugin> r = new ArrayList<>();
          for (PluginWrapper pw : Jenkins.getInstance().getPluginManager().getPlugins()) {
              Plugin p = pw.getUpdateInfo();
              if(p!=null) r.add(p);
          }
          
          return r;
      }