public Builder setPolygon(
          org.bwapi.proxy.messages.TerrainMessages.Polygon.Builder builderForValue) {
        if (polygonBuilder_ == null) {
          polygon_ = builderForValue.build();
          onChanged();
        } else {
          polygonBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000002;
        return this;
      }