public Builder clearAirWeapon() {
        if (airWeaponBuilder_ == null) {
          airWeapon_ = org.bwapi.proxy.messages.GameMessages.WeaponType.getDefaultInstance();
          onChanged();
        } else {
          airWeaponBuilder_.clear();
        }
        bitField1_ = (bitField1_ & ~0x00000008);
        return this;
      }