public Builder addRegions(
          int index, org.bwapi.proxy.messages.TerrainMessages.Region.Builder builderForValue) {
        if (regionsBuilder_ == null) {
          ensureRegionsIsMutable();
          regions_.add(index, builderForValue.build());
          onChanged();
        } else {
          regionsBuilder_.addMessage(index, builderForValue.build());
        }
        return this;
      }