DrupalKernel::updateModules

public DrupalKernel::updateModules(array $module_list, array $module_filenames = array())

public function updateModules(array $module_list, array $module_filenames = array()) {
  $pre_existing_module_namespaces = [];
  if ($this->booted && is_array($this->moduleList)) {
    $pre_existing_module_namespaces = $this->getModuleNamespacesPsr4($this->getModuleFileNames());
  }
  $this->moduleList = $module_list;
  foreach ($module_filenames as $name => $extension) {
    $this->moduleData[$name] = $extension;
  }

  // If we haven't yet booted, we don't need to do anything: the new module
  // list will take effect when boot() is called. However we set a
  // flag that the container needs a rebuild, so that a potentially cached
  // container is not used. If we have already booted, then rebuild the
  // container in order to refresh the serviceProvider list and container.
  $this->containerNeedsRebuild = TRUE;
  if ($this->booted) {
    // We need to register any new namespaces to a new class loader because
    // the current class loader might have stored a negative result for a
    // class that is now available.
    // @see \Composer\Autoload\ClassLoader::findFile()
    $new_namespaces = array_diff_key(
    $this->getModuleNamespacesPsr4($this->getModuleFileNames()), 
    $pre_existing_module_namespaces
    );
    if (!empty($new_namespaces)) {
      $additional_class_loader = new ClassLoader();
      $this->classLoaderAddMultiplePsr4($new_namespaces, $additional_class_loader);
      $additional_class_loader->register();
    }

    $this->initializeContainer();
  }
}