// include some generally used split functions
please include function splitAtEllipsis.

static Collection<S> gazelle_executeSplitterRule(RuleEngine2 engine, RuleEngine2.SimplifyWithRule rule, S input) {
  O f = rule.function();
  Collection<S> out = cast(f instanceof S
    ? callF(engine.callFunctionOnString, (S) f, input)
    : callF(f, input));
  if (l(out) == 1 && eq(first(out), input)) ret emptyList();
  ret out;
}