public ProcessorBuilder property(final String key, final String value) {
   addProperty(key, value, toBuild.getProperties().getPropertyList());
   return this;
 }
 public ProcessorBuilder processor() {
   final ItemProcessor processor = new ItemProcessor();
   processor.setProperties(new JSLProperties());
   toBuild.setProcessor(processor);
   return new ProcessorBuilder(processor, this);
 }
 public ProcessorBuilder ref(final String ref) {
   toBuild.setRef(ref);
   return this;
 }