static bool eqic(S a, S b) {
  if ((a == null) != (b == null)) ret false;
  if (a == null) ret true;
  ret a.equalsIgnoreCase(b);
}

ifclass Symbol
static bool eqic(Symbol a, Symbol b) {
  ret eq(a, b);
}

static bool eqic(Symbol a, S b) {
  ret eqic(asString(a), b);
}
endif