How to use

indexClauseHandlers

method

in

com.atlassian.jira.issue.search.managers.DefaultSearchHandlerManager$SearchHandlerIndexer

private void indexSearchHandler(final SearchableField field, final SearchHandler handler, final boolean system)
{
  final SearchHandler.SearcherRegistration registration = handler.getSearcherRegistration();
  if (registration != null)
  {
    indexSearcherById(field, registration.getIssueSearcher(), system);
    // NOTE: you must call indexClauseHandlers first since it is populating a map of system fields, I know this sucks a bit, sorry :)
    indexClauseHandlers(field, registration.getClauseHandlers(), system);
    indexSearcherByJqlName(field, registration, system);
  }
  indexClauseHandlers(field, handler.getClauseRegistrations(), system);
}

public void indexSystemClauseHandlers(final Collection<SearchHandler> searchHandlers)
{
  for (final SearchHandler searchHandler : searchHandlers)
  {
    indexClauseHandlers(null, searchHandler.getClauseRegistrations(), true);
  }
}