code: @Override
      public void startPlugins() {
          for (PluginWrapper pluginWrapper : resolvedPlugins) {
              PluginState pluginState = pluginWrapper.getPluginState();
              if ((PluginState.DISABLED != pluginState) && (PluginState.STARTED != pluginState)) {
                  try {
                      log.info("Start plugin '{}'", getPluginLabel(pluginWrapper.getDescriptor()));
                      pluginWrapper.getPlugin().start();
                      pluginWrapper.setPluginState(PluginState.STARTED);
                      startedPlugins.add(pluginWrapper);
  
                      firePluginStateEvent(new PluginStateEvent(this, pluginWrapper, pluginState));
                  } catch (Exception e) {
                      log.error(e.getMessage(), e);
                  }
              }
          }
      }
docs: Start all active plugins.