code: public function loadInstalledPlugins()
      {
          if ($this->disablePlugins) {
              return;
          }
  
          $repo = $this->composer->getRepositoryManager()->getLocalRepository();
          $globalRepo = $this->globalComposer ? $this->globalComposer->getRepositoryManager()->getLocalRepository() : null;
          if ($repo) {
              $this->loadRepository($repo);
          }
          if ($globalRepo) {
              $this->loadRepository($globalRepo);
          }
      }
docs: Loads all plugins from currently installed plugin packages