private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.UnitTypeData, org.bwapi.proxy.messages.GameMessages.UnitTypeData.Builder, org.bwapi.proxy.messages.GameMessages.UnitTypeDataOrBuilder> 
          getUnitTypesFieldBuilder() {
        if (unitTypesBuilder_ == null) {
          unitTypesBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.UnitTypeData, org.bwapi.proxy.messages.GameMessages.UnitTypeData.Builder, org.bwapi.proxy.messages.GameMessages.UnitTypeDataOrBuilder>(
                  unitTypes_,
                  ((bitField0_ & 0x00000800) == 0x00000800),
                  getParentForChildren(),
                  isClean());
          unitTypes_ = null;
        }
        return unitTypesBuilder_;
      }