android/tutorials/tutorial4/src/main/java/com/uber/rib/root/loggedin/MutableScoreStream.java [32:45]:
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  void addVictory(UserName userName) {
    ImmutableMap<UserName, Integer> currentScores = scoresRelay.getValue();

    ImmutableMap.Builder<UserName, Integer> newScoreMapBuilder = new ImmutableMap.Builder<>();
    for (Map.Entry<UserName, Integer> entry : currentScores.entrySet()) {
      if (entry.getKey().equals(userName)) {
        newScoreMapBuilder.put(entry.getKey(), entry.getValue() + 1);
      } else {
        newScoreMapBuilder.put(entry.getKey(), entry.getValue());
      }
    }

    scoresRelay.accept(newScoreMapBuilder.build());
  }
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android/tutorials/tutorial3-completed/src/main/java/com/uber/rib/root/loggedin/MutableScoreStream.java [31:44]:
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  void addVictory(String userName) {
    ImmutableMap<String, Integer> currentScores = scoresRelay.getValue();

    ImmutableMap.Builder<String, Integer> newScoreMapBuilder = new ImmutableMap.Builder<>();
    for (Map.Entry<String, Integer> entry : currentScores.entrySet()) {
      if (entry.getKey().equals(userName)) {
        newScoreMapBuilder.put(entry.getKey(), entry.getValue() + 1);
      } else {
        newScoreMapBuilder.put(entry.getKey(), entry.getValue());
      }
    }

    scoresRelay.accept(newScoreMapBuilder.build());
  }
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