get the timestamp for this pair . concode_field_sep ItemSimple item concode_elem_sep boolean prefix concode_elem_sep Set<Integer> sequencesID concode_elem_sep boolean postfix concode_elem_sep long timestamp concode_field_sep Set<Integer> getSequencesID concode_elem_sep boolean isPostfix concode_elem_sep int hashCode concode_elem_sep void setSequencesID concode_elem_sep boolean equals concode_elem_sep ItemSimple getItem concode_elem_sep int getCount concode_elem_sep boolean isPrefix
long function ( ) { return timestamp ; }