How to wrap jstree children with span so that i can group them

i wanted to wrap the whole children with span, so that i can give them background-color

i want wrap all children like below

  <span class="children-group-wrapper">
     <span>Group Child 1</span>
     <span>Group Child 2</span>
  </span>

Css:

span.children-group-wrapper{border:1px solid orange;}

i'm creating those 2 nodes Group Child 1 and Group Child 2 with below code:

$('#using_json_2').jstree().create_node('ajson2',  obj, "last");

Below is my Desired Output(think border as a perfect border):

Note: i don't want to use html jstree

var treeData = [
  { "id" : "ajson1", "parent" : "#", "text" : "Simple root node"},
  { "id" : "ajson2", "parent" : "#", "text" : "Root node 2"}
];

var childrenGroup = [
  { "id" : "ajson3", "parent" : "ajson2", "text" : "Group Child 1",children:false,"icon":"fa fa-file-o",groupClass:'children-group-wrapper1'},
  { "id" : "ajson4", "parent" : "ajson2", "text" : "Group Child 2",children:false,"icon":"fa fa-file-o",groupClass:'children-group-wrapper1'},
   { "id" : "ajson5", "parent" : "ajson2", "text" : "2nd Group Child 1",children:false,"icon":"fa fa-file-o",groupClass:'children-group-wrapper2'},
    { "id" : "ajson6", "parent" : "ajson2", "text" : "2nd Group Child 2",children:false,"icon":"fa fa-file-o",groupClass:'children-group-wrapper2'}
];

var myTree = $('#using_json_2').jstree({ 'core' : {
   "check_callback": true,
   'data' : treeData // Use it here
}});

myTree.on('changed.jstree', function(e, data) {
   childrenGroup.forEach(function(obj){
      $('#using_json_2').jstree().create_node('ajson2',  obj, "last");
   });
    $('#using_json_2').jstree().open_node('ajson2');
});

.children-group-wrapper1{
   border:1px solid orange;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>


<div id="using_json_2"> </div>

Please help me thanks in advance!!!!!!!!!!!

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