docs: private static String findGnuplotHelperScript() {
      if(!GnuplotInstaller.FOUND_GP) {
        LOG.warn("Skipping Gnuplot Shell Script Install since Gnuplot executable was not found");
        return null;
      }
      if(!GnuplotInstaller.GP_FILE.exists()) {
        GnuplotInstaller.installMyGnuPlot();
      }
      if(GnuplotInstaller.GP_FILE.exists() && GnuplotInstaller.GP_FILE.canExecute()) {
        LOG.info("Auto Installed Gnuplot Invoker at [{}]", GnuplotInstaller.GP_FILE.getAbsolutePath());
        return GnuplotInstaller.GP_FILE.getAbsolutePath();
      }
      
      final URL url = GraphHandler.class.getClassLoader().getResource(WRAPPER);
      if (url == null) {
        throw new RuntimeException("Couldn't find " + WRAPPER + " on the"
          + " CLASSPATH: " + System.getProperty("java.class.path"));
      }
      final String path = url.getFile();
      LOG.debug("Using Gnuplot wrapper at {}", path);
      final File file = new File(path);
      final String error;
      if (!file.exists()) {
        error = "non-existent";
      } else if (!file.canExecute()) {
        error = "non-executable";
      } else if (!file.canRead()) {
        error = "unreadable";
      } else {
        return path;
      }
      throw new RuntimeException("The " + WRAPPER + " found on the"
        + " CLASSPATH (" + path + ") is a " + error + " file...  WTF?"
        + "  CLASSPATH=" + System.getProperty("java.class.path"));
    }