memberDisplayName static method
Group member display name priority: nameCard > friendRemark > nickname > userID
Implementation
static String memberDisplayName(GroupMember member) {
if (member.nameCard != null && member.nameCard!.isNotEmpty) return member.nameCard!;
if (member.friendRemark != null && member.friendRemark!.isNotEmpty) return member.friendRemark!;
if (member.nickname != null && member.nickname!.isNotEmpty) return member.nickname!;
return member.userID;
}