}
private String processContentExpr(Sequence contextSeq, DynamicContext dynEnv)
throws XQueryException {
final Sequence src = _contentExpr.eval(contextSeq, dynEnv);
final Sequence<? extends Item> textSeq = src.atomize(dynEnv);
final IFocus<? extends Item> itor = textSeq.iterator();
if(!itor.hasNext()) {
itor.closeQuietly();
return "";
}