this.Devices.getTotalDeviceCount().then((count) => {
      this.dataTableOptions.paging.count = count;

      this.Devices.getPage(offset * size, size, this.columnSort).then((set) => {
        // only insert items i don't already have
        set.forEach((r, i) => {
          var idx = i + (offset * size);
          this.Devices.data[idx] = r;
        });
      });
    });