modules/jooby-hbs/src/main/java/org/jooby/hbs/Hbs.java
public Hbs doWith(final Consumer<Handlebars> callback) {
    requireNonNull(callback, "Configurer is required.");
    return doWith((hbs, conf) -> callback.accept(hbs));
  }
public Hbs doWith(final Consumer<Handlebars> callback) {
    requireNonNull(callback, "Configurer is required.");
    return doWith((hbs, conf) -> callback.accept(hbs));
  }
Set a handlebars callback.

<pre>{@code
{
use(new Hbs().doWith((hbs, conf) -> {
...
});
}
}</pre>
@param callback Configurer callback.
@return This module.