text: #
  # Copyright (c) 2012 OpenStack LLC.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  # implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  
  # following function taken from python-keystoneclient - keystoneclient/utils.py
  # Decorator for cli-args
  def arg(*args, **kwargs):
      def _decorator(func):
          # Because of the sematics of decorator composition if we just append
          # to the options list positional options will appear to be backwards.
          func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
          return func
      return _decorator
  