svoid assertNotEqualsBothDirectionsVerbose(O x, O y) {
  assertNotEqualsBothDirectionsVerbose((S) null, x, y);
}

svoid assertNotEqualsBothDirectionsVerbose(S msg, O x, O y) {
  assertNotEqualsVerbose(msg, x, y);
  assertNotEqualsVerbose(msg, y, x);
}