mentionPrefixHandler function Null safety

String? mentionPrefixHandler(
  1. IMessage message
)

Implementation

String? mentionPrefixHandler(IMessage message) {
  final mentionPrefixRegex = RegExp('<@(!?)(${message.client.appId})>');

  final matches = mentionPrefixRegex.firstMatch(message.content);
  if (matches != null) {
    return matches.group(0);
  }

  return null;
}