private static SingleID specsToSpecialInverse(Specs specs) {
if (!specs.source.equalsIgnoreCase(ANY)) {
return null;
}
String inverseTarget = (String) SPECIAL_INVERSES.get(
new CaseInsensitiveString(specs.target));
if (inverseTarget != null) {
// If the original ID contained "Any-" then make the
// special inverse "Any-Foo"; otherwise make it "Foo".
// So "Any-NFC" => "Any-NFD" but "NFC" => "NFD".
StringBuffer buf = new StringBuffer();