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

svoid assertEqualsBothDirectionsVerbose(S msg, O x, O y) {
  assertEqualsVerbose(msg, x, y);
  assertEqualsVerbose(msg, y, x);
}