code: public static Specification<JpaTargetFilterQuery> byAutoAssignDS(final DistributionSet distributionSet) {
          return (targetFilterQueryRoot, query, cb) -> cb
                  .equal(targetFilterQueryRoot.get(JpaTargetFilterQuery_.autoAssignDistributionSet), distributionSet);
      }
docs: {@link Specification} for retrieving {@link JpaTargetFilterQuery}s based
  on is {@link JpaTargetFilterQuery#getName()}.
  
  @param distributionSet
  of the filter
  @return the {@link JpaTargetFilterQuery} {@link Specification}