Method opr

dnn/test/common/task_record_check.h:140–145

get the opr impl so setting other than param() can be modified

    //! get the opr impl so setting other than param() can be modified
    Opr* opr() {
        if (!m_opr_cur) {
            m_opr_cur = m_handle->create_operator<Opr>();
        }
        return m_opr_cur.get();
    }

    void free_opr() {
        if (m_opr_cur) {