public function update_9001001() {
    $this->updater->syncWithTemplate('.gitignore', TRUE);
    $composer_json = $this->updater->getComposerJson();
    if (isset($composer_json['extra']['installer-paths']['drush/contrib/{$name}'])) {
      unset($composer_json['extra']['installer-paths']['drush/contrib/{$name}']);
    }
    $composer_json['extra']['installer-paths']['drush/Commands/{$name}'][] = 'type:drupal-drush';
    $this->updater->writeComposerJson($composer_json);
    $messages = [
      "Your composer.json file has been modified to be compatible with Drush 9.",
      "You must execute `composer update --lock` to update your lock file.",
    ];
    $formattedBlock = $this->updater->getFormatter()->formatBlock($messages, 'ice');
    $this->updater->getOutput()->writeln("");
    $this->updater->getOutput()->writeln($formattedBlock);
    $this->updater->getOutput()->writeln("");
  }