hasChangedMentionType method Null safety

MentionType? hasChangedMentionType()

Implementation

MentionType? hasChangedMentionType() {
  if (oldValues == null || oldValues?['mention_type'] == null) {
    return null;
  }
  final oldMentionType =
      MentionType.values.byName(oldValues?['mention_type']);

  return oldMentionType != mentionType ? mentionType : null;
}