public Builder setUnitTypes(
          int index, org.bwapi.proxy.messages.GameMessages.UnitTypeData.Builder builderForValue) {
        if (unitTypesBuilder_ == null) {
          ensureUnitTypesIsMutable();
          unitTypes_.set(index, builderForValue.build());
          onChanged();
        } else {
          unitTypesBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }