private CompiledXQuery wrap(
CompiledXQuery expr, WrapperFactory wrapperFactory, XQueryContext context)
throws XPathException {
if (wrapperFactory == null) return expr;
Function wrapper = wrapperFactory.createWrapper(context);
wrapper.setArguments(Collections.singletonList((Expression) expr));
// wrapper.setSource(expr.getSource());
return wrapper;
}
