docs: public void saveCurrentPlot() {
      // TODO: exclude "do not export" layers!
      final SVGPlot currentPlot = svgCanvas.getPlot();
      if(currentPlot != null) {
        SVGSaveDialog.showSaveDialog(currentPlot, 512, 512);
      }
      else {
        LoggingUtil.warning("saveCurrentPlot() called without a visible plot!");
      }
    }