Function _start_ext_load

codebase/sources/dhtmlxscheduler.js:14798–14802

(cal)

      }, 1);
    }
    function _start_ext_load(cal) {
      cal._loading = true;
      cal._not_render = true;
      cal.callEvent("onXLS", []);
    }
    function _finish_ext_load(cal) {
      cal._not_render = false;
      if (cal._render_wait)