code: public Optional<DefaultTemplates> getDefaultTemplates(DbSession dbSession, String organizationUuid) {
      checkUuid(organizationUuid);
      return Optional.ofNullable(getMapper(dbSession).selectDefaultTemplatesByUuid(organizationUuid));
    }
docs: Retrieve the default template of the specified organization if:
  <ol>
  <li>the specified organization exists</li>
  <li>the project default permission template is defined</li>
  </ol>