order by increasing sequence number concode_field_sep long sequenceNumber concode_elem_sep long lastFeedbacktime concode_elem_sep long k concode_field_sep void feedback concode_elem_sep long getSequenceNumber concode_elem_sep long getK concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep long getLastFeedbackTime