static <A> A assertEquals(O x, A y) {
  ret assertEquals(null, x, y);
}

static <A> A assertEquals(S msg, O x, A y) {
  if (assertVerbose()) ret assertEqualsVerbose(msg, x, y);
  if (!(x == null ? y == null : x.equals(y)))
    fail((msg != null ? msg + ": " : "") + y + " != " + x);
  ret y;
}

ifclass Scorer
  svoid assertEquals(Scorer scorer, S msg default "", S x, S y) {
    if (scorer == null) ret with assertEquals(msg, x, y);
    scorer.add(eq(x, y), nullIfEmpty(msg));
  }
endif