docs: def update_disk(kwargs=None, conn=None, call=None):
      '''
      .. versionadded:: 2015.8.0
  
      Update a disk's properties
  
      CLI Example:
  
      .. code-block:: bash
  
          salt-cloud -f update_disk my-azure name=my_disk label=my_disk
          salt-cloud -f update_disk my-azure name=my_disk new_name=another_disk
      '''
      if call != 'function':
          raise SaltCloudSystemExit(
              'The show_disk function must be called with -f or --function.'
          )
  
      if not conn:
          conn = get_conn()
  
      if kwargs is None:
          kwargs = {}
  
      if 'name' not in kwargs:
          raise SaltCloudSystemExit('A name must be specified as "name"')
  
      old_data = show_disk(kwargs={'name': kwargs['name']}, call='function')
      data = conn.update_disk(
          disk_name=kwargs['name'],
          has_operating_system=kwargs.get('has_operating_system', old_data['has_operating_system']),
          label=kwargs.get('label', old_data['label']),
          media_link=kwargs.get('media_link', old_data['media_link']),
          name=kwargs.get('new_name', old_data['name']),
          os=kwargs.get('os', old_data['os']),
      )
      return show_disk(kwargs={'name': kwargs['name']}, call='function')