Method changeRank

src/main/java/manager/Rank.java:40–45

(String playerID, int level)

  }
  
  public boolean changeRank(String playerID, int level) {
    boolean found = this.players.remove(playerID);
    
    if (found) get(level, true).players.add(playerID);
    return found;
  }
  
  
  public static Seq<Rank> copy(boolean defaultRanks) {