code: private static final boolean parentHasSameExPc(JPAPuId parentPuIds[], JPAPuId puId)
      {
          for (JPAPuId parentPuId : parentPuIds)
          {
              if (parentPuId.equals(puId))
              {
                  return true;
              }
          }
          return false;
      }
docs: Returns true if the caller and callee have declared the same @ PersistneceContext
  in their components.