private void maybeForceBuilderInitialization() {
        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
          getWhatBuildsTypeFieldBuilder();
          getRequiredUnitsFieldBuilder();
          getRequiredTechFieldBuilder();
          getAbilitiesFieldBuilder();
          getUpgradesFieldBuilder();
          getArmorUpgradeFieldBuilder();
          getGroundWeaponFieldBuilder();
          getAirWeaponFieldBuilder();
        }
      }