I am using Quasar Tree lazy loading to display the data like shown in image

onclick of first node I am displaying child nodes from a local JSON file, now when i click on respective child node I want to display it sub childs from another JSON file by passing its parent node id.
Here is my code

<template>
  <q-page class="flex fixed-left">
    <q-tree
      :nodes="treeArr"
      node-key="id"
      label-key="content"
      ref="tree"
      no-connectors
      :selected.sync="selected"
      text-color="blue"
    >
    </q-tree>
   

  </q-page>
</template>
<style >
</style>
<script>



import someJson from "./static/somejson.json";
import datasetsJson from "./static/datasetsjson.json";


export default {
  name: "HelloWorld",
  data() {
    return {
      tree: [],
      selected: "",
      selectedObject: null,
      json: someJson,
      djson: datasetsJson,
      newObj: [],
      treeArr: [
        {
          content: "Resources",
          children: [],
        },
      ],
    };
  },
  computed: {},
  methods: {},
    
  created() {
    this.tree = this.get_leaves()
    console.log("json", someJson);

   Object.keys(this.json.body.projects.projects).forEach((j) => {

     
 var child = { id: j, content: this.json.body.projects.projects[j].friendlyName, children: [] };
 this.treeArr[0].children.push(child);
console.log("test", this.json.body.projects.projects[j]);
console.log("childs", child);
})

    
  },
};
</script>

Can any one please tell me how can I get current node and pass it as request parameter to display its respective child nodes.