public java.util.List<? extends org.bwapi.proxy.messages.GameMessages.UpgradeLevelOrBuilder> 
           getUpgradeLevelsOrBuilderList() {
        if (upgradeLevelsBuilder_ != null) {
          return upgradeLevelsBuilder_.getMessageOrBuilderList();
        } else {
          return java.util.Collections.unmodifiableList(upgradeLevels_);
        }
      }