pinnedByUserText method
The text for showing who pinned the message
Implementation
@override
String pinnedByUserText({
required User pinnedBy,
required User currentUser,
}) {
final pinnedByCurrentUser = currentUser.id == pinnedBy.id;
if (pinnedByCurrentUser) return '당신의 핀';
return '${pinnedBy.name}의 핀';
}