Fieldable field = fields[k];
// assume properties fields use
// SingleTokenStream
//t = field.tokenStreamValue().next(t);
field.tokenStreamValue().incrementToken();
CharTermAttribute term = field.tokenStreamValue().getAttribute(CharTermAttribute.class);
PayloadAttribute payload = field.tokenStreamValue().getAttribute(PayloadAttribute.class);
String value = new String(term.buffer(), 0, term.length());
if (value.startsWith(namePrefix))