code: public static Furnace getInstance()
     {
        try
        {
           final BootstrapClassLoader loader = new BootstrapClassLoader("bootpath");
           return getInstance(FurnaceFactory.class.getClassLoader(), loader);
        }
        catch (Exception e)
        {
           throw new RuntimeException(e);
        }
     }
docs: Produce a {@link Furnace} instance using the default bootstrap {@link ClassLoader} to load core furnace
  implementation JARs from `<code>src/main/java/bootpath/*</code>`.