Equivalent of FCK.UpdateLinkedField() in CKEditor

We are updating FCKEditor with CKEditor. In our previsous version we are using below  code :

 this.UpdateEditorFormValue = function()
    {
        for(i = 0;i < parent.frames.length; ++i )
            if(parent.frames[i].FCK )
                parent.frames[i].FCK.UpdateLinkedField();               
    }

Can somebody tell me what will be the Equivalent  code in CKEditor