docs: public static Specification<JpaDistributionSet> hasTag(final Long tagId) {
  
          return (targetRoot, query, cb) -> {
              final SetJoin<JpaDistributionSet, JpaDistributionSetTag> tags = targetRoot.join(JpaDistributionSet_.tags,
                      JoinType.LEFT);
              return cb.equal(tags.get(JpaDistributionSetTag_.id), tagId);
          };
      }