getFallback method

@override String? getFallback(dynamic content)

Implementation

@override
String? getFallback(dynamic content) {
  if (content is TransactionReference) {
    if (content.reference.isNotEmpty) {
      return '[Crypto transaction] Use a blockchain explorer to learn more '
          'using the transaction hash: ${content.reference}';
    }
    return 'Crypto transaction';
  }
  return null;
}