primevue-mirror/service/NodeService.js

export default class NodeService {

    getTreeTableNodes() {
        return fetch('demo/data/treetablenodes.json').then(res => res.json())
                .then(d => d.root);
    }

    getTreeNodes() {
        return fetch('demo/data/treenodes.json').then(res => res.json())
                .then(d => d.root);
    }
}