new_contents: # Copyright 2015 Canonical, Ltd.
  #
  # This program is free software: you can redistribute it and/or modify
  # it under the terms of the GNU Affero General Public License as
  # published by the Free Software Foundation, either version 3 of the
  # License, or (at your option) any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU Affero General Public License for more details.
  #
  # You should have received a copy of the GNU Affero General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  import logging
  from functools import wraps
  from threading import Thread
  
  log = logging.getLogger('subiquity.utils')
  
  
  def async(func):
      """
      Decorator for executing a function in a separate :class:`threading.Thread`.
  
      Only used if we do not care about failures or waiting for some sort of
      promise, callback, return, etc.
      """
      @wraps(func)
      def wrapper(*args, **kwargs):
          thread = Thread(target=func, args=args, kwargs=kwargs)
          thread.daemon = True
          return thread.start()
      return wrapper
  
subject: Add async helper