reload template at runtime

[giuseppe]

i want upgrade version of hadlebar from 2.0.0 to last version
my code
try {
loader = new FileTemplateLoader(new URI(templatePath).getPath());
} catch (URISyntaxException e) {
loader = new FileTemplateLoader(templatePath);
}

handlebars = new Handlebars().with(loader).with(new HighConcurrencyTemplateCache().setReload(true));

Helpers.register(handlebars);
StringHelpers.register(handlebars);

but not reload template at runtime if a make a change in hbs file..