public ReaderBuilder property(final String key, final String value) {
   addProperty(key, value, toBuild.getProperties().getPropertyList());
   return this;
 }
 public ReaderBuilder reader() {
   final ItemReader reader = new ItemReader();
   reader.setProperties(new JSLProperties());
   toBuild.setReader(reader);
   return new ReaderBuilder(reader, this);
 }
 public ReaderBuilder ref(final String ref) {
   toBuild.setRef(ref);
   return this;
 }