code: @Subscribe
      public void handleIndexSetDeletion(final IndexSetDeletedEvent event) {
          final String indexSetId = event.id();
  
          LOG.debug("Disable field type updating for index set <{}>", indexSetId);
          cancel(futures.remove(indexSetId));
      }
docs: Removes the field type polling job for the now deleted index set.
  @param event index set deletion event