question: tell this extractor that propname is a sub-element whose value can be computed thanks to t. concode_field_sep Map<String,ITransformer<? super T,?>> transformers concode_elem_sep List<String> propNames concode_elem_sep Set<String> elements concode_elem_sep String name concode_elem_sep Set<String> attributes concode_elem_sep List<String> equalityPropNames concode_field_sep Object getValue concode_elem_sep String getName concode_elem_sep Extractor<T> addAttribute concode_elem_sep XPath getXPath concode_elem_sep Element createElement concode_elem_sep void addTransformer
target: Extractor < T > function ( String arg0 , ITransformer < ? super T , ? > arg1 ) { addTransformer ( arg0 , arg1 ) ; this . elements . add ( arg0 ) ; return this ; }