private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.TechType, org.bwapi.proxy.messages.GameMessages.TechType.Builder, org.bwapi.proxy.messages.GameMessages.TechTypeOrBuilder> 
          getResearchingFieldBuilder() {
        if (researchingBuilder_ == null) {
          researchingBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.TechType, org.bwapi.proxy.messages.GameMessages.TechType.Builder, org.bwapi.proxy.messages.GameMessages.TechTypeOrBuilder>(
                  researching_,
                  ((bitField0_ & 0x00200000) == 0x00200000),
                  getParentForChildren(),
                  isClean());
          researching_ = null;
        }
        return researchingBuilder_;
      }