question: get the i-th item in this itemset concode_field_sep long timestamp concode_elem_sep List<ItemSimple> items concode_field_sep void addItem concode_elem_sep List<ItemSimple> getItems concode_elem_sep void print concode_elem_sep int size concode_elem_sep long getTimestamp concode_elem_sep Itemset cloneItemSetMinusItems concode_elem_sep String toString concode_elem_sep Itemset cloneItemSet concode_elem_sep void setTimestamp
target: ItemSimple function ( int arg0 ) { return items . get ( arg0 ) ; }