throw or detect null value

[Rob Shepherd]

Hi,

I want to be able to either throw an exception or raise a warning if a variable has resolved to null (and rendered empty)

Is this possible?

Thanks

Rob

[edgar]

Hi,

 Try:

handlebars.registerHelperMissing(new Helper<Object>() {
 public CharSequence apply(Object value, Options options){
   throw new IllegalStateException("No value for " + options.helperName);
 }

Thanks