text: """Null plugin."""
  import logging
  
  import zope.component
  import zope.interface
  
  from certbot import interfaces
  from certbot.plugins import common
  
  
  logger = logging.getLogger(__name__)
  
  
  @zope.interface.implementer(interfaces.IInstaller)
  @zope.interface.provider(interfaces.IPluginFactory)
  class Installer(common.Plugin):
      """Null installer."""
  
      description = "Null Installer"
      hidden = True
  
      # pylint: disable=missing-docstring,no-self-use
  
      def prepare(self):
          pass  # pragma: no cover
  
      def more_info(self):
          return "Installer that doesn't do anything (for testing)."
  
      def get_all_names(self):
          return []
  
      def deploy_cert(self, domain, cert_path, key_path,
                      chain_path=None, fullchain_path=None):
          pass  # pragma: no cover
  
      def enhance(self, domain, enhancement, options=None):
          pass  # pragma: no cover
  
      def supported_enhancements(self):
          return []
  
      def get_all_certs_keys(self):
          return []
  
      def save(self, title=None, temporary=False):
          pass  # pragma: no cover
  
      def rollback_checkpoints(self, rollback=1):
          pass  # pragma: no cover
  
      def recovery_routine(self):
          pass  # pragma: no cover
  
      def view_config_changes(self):
          pass  # pragma: no cover
  
      def config_test(self):
          pass  # pragma: no cover
  
      def restart(self):
          pass  # pragma: no cover
  