code: func (client *Client) DeleteIsolationSegment(guid string) (Warnings, error) {
  	request, err := client.newHTTPRequest(requestOptions{
  		RequestName: internal.DeleteIsolationSegmentRequest,
  		URIParams:   map[string]string{"isolation_segment_guid": guid},
  	})
  	if err != nil {
  		return nil, err
  	}
  
  	var response cloudcontroller.Response
  	err = client.connection.Make(request, &response)
  	return response.Warnings, err
  }
docs: // DeleteIsolationSegment removes an isolation segment from the cloud
  // controller. Note: This will only remove it from the cloud controller
  // database. It will not remove it from diego.