public Builder addPlayers(
          int index, org.bwapi.proxy.messages.GameMessages.Player.Builder builderForValue) {
        if (playersBuilder_ == null) {
          ensurePlayersIsMutable();
          players_.add(index, builderForValue.build());
          onChanged();
        } else {
          playersBuilder_.addMessage(index, builderForValue.build());
        }
        return this;
      }