vuejs2 table automatically check checkboxes

Am using the rawtiw datatable for my vuejs2 laravel app. I would like to automatically toggle some checkboxes as checked

so i have

<vuetable ref="vuetable"
 api-url="/user-management/table-permissions"
 :fields="tablecols"
 :sort-order="sortOrder"
 @vuetable:load-success="loadedData"

>

</vuetable>

THe fields have a checkbox as

    {
    name: '__checkbox',
    title: '#',
    titleClass: 'text-right',
    dataClass: 'text-right'
  }, 
 ....others

what am trying to do is to mark certain checkboxes as checked when the table loads successifully

loadedData(){
  this.$refs.vuetable.selectedTo[1] //mark 1 as checked

  }

But the above fails. How do i go about toggeling the checkboxes as checked.Is there anyone who has done this successifully. I have opened a github issue request but not got an answer yet.