Function _start_ext_load

codebase/sources/dhtmlxscheduler.es.js:14794–14798

(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)