public java.util.List<? extends org.bwapi.proxy.messages.TerrainMessages.PolygonOrBuilder> 
           getUnwalkablePolygonOrBuilderList() {
        if (unwalkablePolygonBuilder_ != null) {
          return unwalkablePolygonBuilder_.getMessageOrBuilderList();
        } else {
          return java.util.Collections.unmodifiableList(unwalkablePolygon_);
        }
      }