code: void cancelAssignDistributionSetEvent(final Target target, final Long actionId) {
          afterCommit.afterCommit(
                  () -> eventPublisher.publishEvent(new CancelTargetAssignmentEvent(target, actionId, bus.getId())));
      }
docs: Sends the {@link CancelTargetAssignmentEvent} for a specific target to
  the eventPublisher.
  
  @param target
  the Target which has been assigned to a distribution set
  @param actionId
  the action id of the assignment