Currently we add request parameters for the comboboxes as prefix to the url:
$('#myCombobx1').combobox({
url:'serverSideMethod.do?eN=xxx.itsm.Change&idCN=changeId&cN=changeState&cVal=CREATED&oBc=changeId',
hasDownArrow:true,
....
});
In somecases however, there are many parameters where queryParams (like in datagrid) would make sense. In general, queryParams makes always sense with url. Thanking you for considering this request.