     /*
        @property {Boolean} showExtension
        @description Nodes extension visibility
        Values true, false
        Default: true
      */
      showExtension: {
        value: true,
        reflect: true
      },
      /*
        @property {Object} store
        @description vc-store element reference
      */
      store: {
        value: {},
        reflect: false
      },
      /*
        @property {Object} selectedNode
        @description Selected tree node reference
      */
      se