svoid assertInstanceOfVerbose(Class type, O o) {
  if (isInstance(type, o))
    print("OK: " + _getClass(o) + " is a subclass of " + type);
  else
    fail(_getClass(o) + " is not a subclass of " + type);
}

svoid assertInstanceOfVerbose(O o, Class type) {
  assertInstanceOfVerbose(type, o);
}

Began life as a copy of #1018570