Change fetchXml for a subgrid dynamically

fetchsubgridClassicUI.js

/*----------------------------------------
Change fetchXml for a subgrid dynamically
-----------------------------------------*/

function FetchViaName(executionContext) {
  var formContext = executionContext.getFormContext();
  
  var tabObj = formContext.ui.tabs.get("tab_summary");
  var secObj = tabObj.sections.get("sec_contactCompaigns");
  secObj.setVisible(false)

  var fullname = formContext.getAttribute("fullname").getValue();
  console.log("FullName: "+fullname)
  var contactCompaigns = window.parent.document.getElementById("ContatCompaigns");

  if (contactCompaigns == null) {
    setTimeout(function () { FetchViaName(executionContext); }, 2000);
    return;
  }
  else {
    var fetchXml = '<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="true">' +
      '<entity name="campaign">' +
      '<attribute name="name" />' +
      '<order attribute="name" descending="true" />' +
      '<link-entity name="campaignitem" from="campaignid" to="campaignid" visible="false" intersect="true">' +
      '<link-entity name="list" from="listid" to="entityid" alias="al">' +
      '<link-entity name="listmember" from="listid" to="listid" visible="false" intersect="true">' +
      '<link-entity name="contact" from="contactid" to="entityid" alias="am">' +
      '<filter type="and">' +
      '<condition attribute="fullname" operator="eq" value="'+fullname+'"'+'/>' +
      '</filter>' +
      '</link-entity>' +
      '</link-entity>' +
      '</link-entity>' +
      '</link-entity>' +
      '</entity>' +
      '</fetch>';
    if (contactCompaigns.control != null) {
      //Here i set the fetchxml directly to subgrid
      contactCompaigns.control.SetParameter("fetchXml", fetchXml); //set the fetch xml to the sub grid
      contactCompaigns.control.Refresh(); //refresh the sub grid using the new fetch xml
      secObj.setVisible(true)

    }
    else {
      setTimeout(function () { FetchViaName(executionContext); }, 2000);
    }
  }
}