getReceiversForUser method Null safety

Set<User> getReceiversForUser(
  1. User user
)

Implementation

Set<User> getReceiversForUser(final User user) {
  final receivers = getParticipantsNotSender()
      .where((e) => e.userId != sender.userId)
      .toSet();

  return user.userId == sender.userId
      ? receivers
      : {
          sender,
          ...receivers,
        };
}