docs: def get_size(vm_):
      '''
      Return the VM's size. Used by create_node().
      '''
      sizes = avail_sizes()
      vm_size = six.text_type(config.get_cloud_config_value(
          'size', vm_, __opts__, search_global=False
      ))
  
      if not vm_size:
          raise SaltCloudNotFound('No size specified for this VM.')
  
      if vm_size and six.text_type(vm_size) in sizes:
          return sizes[vm_size]['InstanceTypeId']
  
      raise SaltCloudNotFound(
          'The specified size, \'{0}\', could not be found.'.format(vm_size)
      )