docs: def get_image(server_):
      ''' Return the image object to use.
      '''
      images = avail_images()
      server_image = six.text_type(config.get_cloud_config_value(
          'image', server_, __opts__, search_global=False
      ))
      for image in images:
          if server_image in (images[image]['name'], images[image]['id']):
              return images[image]['id']
      raise SaltCloudNotFound(
          'The specified image, \'{0}\', could not be found.'.format(server_image)
      )