old_contents: # All rights reserved.
  #
  #    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.
  
  from neutron_lib.api import converters
  from neutron_lib.api.definitions import network
  from neutron_lib.api.definitions import network_mtu
  
  
  MTU = 'mtu'
  
  # The alias of the extension.
  ALIAS = 'net-mtu-writable'
  
  # Whether or not this extension is simply signaling behavior to the user
  # or it actively modifies the attribute map.
  IS_SHIM_EXTENSION = False
  
  # Whether the extension is marking the adoption of standardattr model for
  # legacy resources, or introducing new standardattr attributes. False or
  # None if the standardattr model is adopted since the introduction of
  # resource extension.
  # If this is True, the alias for the extension should be prefixed with
  # 'standard-attr-'.
  IS_STANDARD_ATTR_EXTENSION = False
  
  # The name of the extension.
  NAME = 'Network MTU (writable)'
  
  # A prefix for API resources. An empty prefix means that the API is going
  # to be exposed at the v2/ level as any other core resource.
  API_PREFIX = ''
  
  # The description of the extension.
  DESCRIPTION = (
      "Provides a writable MTU attribute for a network resource.")
  
  # A timestamp of when the extension was introduced.
  UPDATED_TIMESTAMP = "2017-07-12T00:00:00-00:00"
  
  
  RESOURCE_ATTRIBUTE_MAP = {
      network.COLLECTION_NAME: {
          MTU: {'allow_post': True, 'allow_put': True, 'is_visible': True,
                'validate': {'type:non_negative': None}, 'default': 0,
                'convert_to': converters.convert_to_int},
      },
  }
  
  # The subresource attribute map for the extension. It adds child resources
  # to main extension's resource. The subresource map must have a parent and
  # a parameters entry. If an extension does not need such a map, None can
  # be specified (mandatory).
  SUB_RESOURCE_ATTRIBUTE_MAP = {}
  
  # The action map: it associates verbs with methods to be performed on
  # the API resource.
  ACTION_MAP = {}
  
  # The action status.
  ACTION_STATUS = {
  }
  
  # The list of required extensions.
  REQUIRED_EXTENSIONS = [network_mtu.ALIAS]
  
  # The list of optional extensions.
  OPTIONAL_EXTENSIONS = []
  
new_contents: # All rights reserved.
  #
  #    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.
  
  from neutron_lib.api import converters
  from neutron_lib.api.definitions import network
  from neutron_lib.api.definitions import network_mtu
  
  
  MTU = 'mtu'
  
  # The alias of the extension.
  ALIAS = 'net-mtu-writable'
  
  # Whether or not this extension is simply signaling behavior to the user
  # or it actively modifies the attribute map.
  IS_SHIM_EXTENSION = False
  
  # Whether the extension is marking the adoption of standardattr model for
  # legacy resources, or introducing new standardattr attributes. False or
  # None if the standardattr model is adopted since the introduction of
  # resource extension.
  # If this is True, the alias for the extension should be prefixed with
  # 'standard-attr-'.
  IS_STANDARD_ATTR_EXTENSION = False
  
  # The name of the extension.
  NAME = 'Network MTU (writable)'
  
  # A prefix for API resources. An empty prefix means that the API is going
  # to be exposed at the v2/ level as any other core resource.
  API_PREFIX = ''
  
  # The description of the extension.
  DESCRIPTION = (
      "Provides a writable MTU attribute for a network resource.")
  
  # A timestamp of when the extension was introduced.
  UPDATED_TIMESTAMP = "2017-07-12T00:00:00-00:00"
  
  
  RESOURCE_ATTRIBUTE_MAP = {
      network.COLLECTION_NAME: {
          MTU: {'allow_post': True, 'allow_put': True, 'is_visible': True,
                'is_filter': True, 'is_sort_key': True,
                'validate': {'type:non_negative': None}, 'default': 0,
                'convert_to': converters.convert_to_int},
      },
  }
  
  # The subresource attribute map for the extension. It adds child resources
  # to main extension's resource. The subresource map must have a parent and
  # a parameters entry. If an extension does not need such a map, None can
  # be specified (mandatory).
  SUB_RESOURCE_ATTRIBUTE_MAP = {}
  
  # The action map: it associates verbs with methods to be performed on
  # the API resource.
  ACTION_MAP = {}
  
  # The action status.
  ACTION_STATUS = {
  }
  
  # The list of required extensions.
  REQUIRED_EXTENSIONS = [network_mtu.ALIAS]
  
  # The list of optional extensions.
  OPTIONAL_EXTENSIONS = []
  
subject: Allow filtering/sorting by the 'mtu' field