code: func (actor Actor) ResetSpaceIsolationSegment(orgGUID string, spaceGUID string) (string, Warnings, error) {
  	var allWarnings Warnings
  
  	_, apiWarnings, err := actor.CloudControllerClient.UpdateSpaceIsolationSegmentRelationship(spaceGUID, "")
  	allWarnings = append(allWarnings, apiWarnings...)
  	if err != nil {
  		return "", allWarnings, err
  	}
  
  	isoSegRelationship, apiWarnings, err := actor.CloudControllerClient.GetOrganizationDefaultIsolationSegment(orgGUID)
  	allWarnings = append(allWarnings, apiWarnings...)
  	if err != nil {
  		return "", allWarnings, err
  	}
  
  	var isoSegName string
  	if isoSegRelationship.GUID != "" {
  		isolationSegment, apiWarnings, err := actor.CloudControllerClient.GetIsolationSegment(isoSegRelationship.GUID)
  		allWarnings = append(allWarnings, apiWarnings...)
  		if err != nil {
  			return "", allWarnings, err
  		}
  		isoSegName = isolationSegment.Name
  	}
  
  	return isoSegName, allWarnings, nil
  }
docs: // ResetSpaceIsolationSegment disassociates a space from an isolation segment.
  //
  // If the space's organization has a default isolation segment, return its
  // name. Otherwise return the empty string.