wn.query_reports["Testing Report"] = {
    "filters": [
        {
            "fieldname":"select_all",
            "label": "Select All",
            "fieldtype": "Check",
        }
    ]
}
wn.provide("public/js/slickgrid.min.js")

var checkboxSelector = new Slick.CheckboxSelectColumn({
      cssClass: "slick-cell-checkboxsel"
    });