text: # Copyright 2016 Google Inc. 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.
  """Command to disable billing."""
  
  import textwrap
  from googlecloudsdk.api_lib.billing import utils
  from googlecloudsdk.calliope import base
  
  
  class Unlink(base.Command):
    """Unlink the account (if any) linked with a project."""
    detailed_help = {
        'DESCRIPTION': textwrap.dedent(
            """
            This command unlinks a project from it's linked billing
            account. This disables billing on the project.
            """
        )
    }
  
    @staticmethod
    def Args(parser):
      parser.add_argument('project_id', **utils.PROJECT_ID_ARG_PARAMS)
  
    def Run(self, args):
      billing = self.context['billing_client']
      messages = self.context['billing_messages']
  
      result = billing.projects.UpdateBillingInfo(
          messages.CloudbillingProjectsUpdateBillingInfoRequest(
              name='projects/{project_id}'.format(
                  project_id=args.project_id,
              ),
              projectBillingInfo=messages.ProjectBillingInfo(
                  billingAccountName='',
              ),
          )
      )
      return result
  