text: # Copyright (c) 2014 Rackspace, Inc.
  #
  # 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.
  
  import abc
  
  import six
  
  
  @six.add_metaclass(abc.ABCMeta)
  class ProviderControllerBase(object):
  
      """Top-level class for controllers.
  
      :param driver: Instance of the driver
          instantiating this controller.
      """
  
      def __init__(self, driver):
          self._driver = driver
  