isBattleDraw method

Implementation

bool isBattleDraw() {
  BattleUser? firstUser = battleState.battleUsers.value.firstOrNull;
  BattleUser? lastUser = battleState.battleUsers.value.lastOrNull;
  if (firstUser == null || lastUser == null) {
    return false;
  }
  return firstUser.ranking == lastUser.ranking;
}