code: func (actor Actor) GetServicePlansForService(serviceName, brokerName string) ([]ServicePlan, Warnings, error) {
  	service, allWarnings, err := actor.GetServiceByNameAndBrokerName(serviceName, brokerName)
  	if err != nil {
  		return []ServicePlan{}, allWarnings, err
  	}
  
  	servicePlans, warnings, err := actor.CloudControllerClient.GetServicePlans(ccv2.Filter{
  		Type:     constant.ServiceGUIDFilter,
  		Operator: constant.EqualOperator,
  		Values:   []string{service.GUID},
  	})
  	allWarnings = append(allWarnings, warnings...)
  	if err != nil {
  		return []ServicePlan{}, allWarnings, err
  	}
  
  	var plansToReturn []ServicePlan
  	for _, plan := range servicePlans {
  		plansToReturn = append(plansToReturn, ServicePlan(plan))
  	}
  
  	return plansToReturn, allWarnings, nil
  }
docs: // GetServicePlansForService returns a list of plans associated with the service and the broker if provided