private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.RaceData, org.bwapi.proxy.messages.GameMessages.RaceData.Builder, org.bwapi.proxy.messages.GameMessages.RaceDataOrBuilder> 
          getRacesFieldBuilder() {
        if (racesBuilder_ == null) {
          racesBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.RaceData, org.bwapi.proxy.messages.GameMessages.RaceData.Builder, org.bwapi.proxy.messages.GameMessages.RaceDataOrBuilder>(
                  races_,
                  ((bitField0_ & 0x00010000) == 0x00010000),
                  getParentForChildren(),
                  isClean());
          races_ = null;
        }
        return racesBuilder_;
      }