public Builder setResearching(
          int index, org.bwapi.proxy.messages.GameMessages.TechType.Builder builderForValue) {
        if (researchingBuilder_ == null) {
          ensureResearchingIsMutable();
          researching_.set(index, builderForValue.build());
          onChanged();
        } else {
          researchingBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }