static bool cic(Collection<S> l, S s) {
  ret containsIgnoreCase(l, s);
}

ifclass Symbol
static bool cic(Collection<Symbol> l, Symbol s) {
  ret contains(l, s);
}
endif

static bool cic(S[] l, S s) {
  ret containsIgnoreCase(l, s);
}

static bool cic(S s, char c) {
  ret containsIgnoreCase(s, c);
}

static boolean cic(S a, S b) {
  ret containsIgnoreCase(a, b);
}