public Builder setHoles(
          int index, org.bwapi.proxy.messages.TerrainMessages.Polygon.Builder builderForValue) {
        if (holesBuilder_ == null) {
          ensureHolesIsMutable();
          holes_.set(index, builderForValue.build());
          onChanged();
        } else {
          holesBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }