code: public void enableMultiTenancyFilter() {
          Serializable currentId = Tenants.currentId(this);
          if(ConnectionSource.DEFAULT.equals(currentId)) {
              disableMultiTenancyFilter();
          }
          else {
              getHibernateTemplate()
                      .getSessionFactory()
                      .getCurrentSession()
                      .enableFilter(GormProperties.TENANT_IDENTITY)
                      .setParameter(GormProperties.TENANT_IDENTITY, currentId);
          }
      }
docs: Enable the tenant id filter for the given datastore and entity