code: func (actor Actor) GetServiceBindingByApplicationAndServiceInstance(appGUID string, serviceInstanceGUID string) (ServiceBinding, Warnings, error) {
  	serviceBindings, warnings, err := actor.CloudControllerClient.GetServiceBindings(
  		ccv2.Filter{
  			Type:     constant.AppGUIDFilter,
  			Operator: constant.EqualOperator,
  			Values:   []string{appGUID},
  		},
  		ccv2.Filter{
  			Type:     constant.ServiceInstanceGUIDFilter,
  			Operator: constant.EqualOperator,
  			Values:   []string{serviceInstanceGUID},
  		},
  	)
  
  	if err != nil {
  		return ServiceBinding{}, Warnings(warnings), err
  	}
  
  	if len(serviceBindings) == 0 {
  		return ServiceBinding{}, Warnings(warnings), actionerror.ServiceBindingNotFoundError{
  			AppGUID:             appGUID,
  			ServiceInstanceGUID: serviceInstanceGUID,
  		}
  	}
  
  	return ServiceBinding(serviceBindings[0]), Warnings(warnings), err
  }
docs: // GetServiceBindingByApplicationAndServiceInstance returns a service binding
  // given an application GUID and and service instance GUID.