toJson method

Implementation

@override
Map<String, dynamic> toJson() {
  return {
    '@type': 'inputMessageInvoice',
    if (extra != null) '@extra': extra,
    'invoice': invoice,
    'title': title,
    'description': description,
    'photo_url': photo_url,
    'photo_size': photo_size,
    'photo_width': photo_width,
    'photo_height': photo_height,
    'payload': payload,
    'provider_token': provider_token,
    'provider_data': provider_data,
    'start_parameter': start_parameter,
    'extended_media_content': extended_media_content
  };
}