declare USER1_LIST
     querysetUser1 :JSONArray
end
declare USER2_LIST
     querysetUser2 :JSONArray
end
......
......
......

rule "setUp"
salience 25
when
then
USER1_LIST user1_list = new USER1_LIST();
user1_list.setQuerysetUser1(new JSONArray());
insert(user1_list);
....

rule "RULE_XYZ"
salience 5
when
USER1_LIST($querysetUser1 :querysetUser1)
...<Some code>
then
...<Some code>
$querysetUser1.add(...);