# PreviewButton.fromJson constructor

PreviewButton.fromJson(

1. Map<String, dynamic> json

)

## Implementation

    factory PreviewButton.fromJson(Map<String, dynamic> json) {
      String _type = json["_type"];
      switch (_type) {
        case "PagePreviewMode":
          return PagePreviewMode.fromJson(json);
        case "TextButtonMode":
          return TextButtonMode.fromJson(json);
        case "NoButtonMode":
          return NoButtonMode.fromJson(json);
        default:
          throw ArgumentError("Invalid polymorphic type: $_type");
      }
    }