code: private void initializePropertyReader()
      {
          if (propertyReader == null)
          {
              propertyReader = new KuduDBPropertyReader(externalProperties,
                      kunderaMetadata.getApplicationMetadata().getPersistenceUnitMetadata(getPersistenceUnit()));
              propertyReader.read(getPersistenceUnit());
          }
      }
docs: Initialize property reader.