docs: protected JdbcQueue<ID, DATA> setJdbcHelper(IJdbcHelper jdbcHelper,
              boolean setMyOwnJdbcHelper) {
          if (this.jdbcHelper != null && myOwnJdbcHelper
                  && this.jdbcHelper instanceof AbstractJdbcHelper) {
              ((AbstractJdbcHelper) this.jdbcHelper).destroy();
          }
          this.jdbcHelper = jdbcHelper;
          myOwnJdbcHelper = setMyOwnJdbcHelper;
          return this;
      }