docs: function livereloadProp(json, field, prop) {
    if (json && json[field]) {
  
      var keysLength = json[field].length;
      while (keysLength--) {
        var value = json[field][keysLength].$[prop];
        if (value && this.validateNavigationProp(value) !== undefined) {
          return value
        }
      }
    }
    return undefined;
  }