static Matches getFlexMatchIC(S pat, S s) {
  new Matches m;
  ret flexMatchIC(pat, s, m) ? m : null;
}

static Matches getFlexMatchIC(S pat, S s, bool joinBrackets) {
  new Matches m;
  ret flexMatchIC(pat, s, m, joinBrackets) ? m : null;
}

static Matches getFlexMatchIC(S pat, LS tokInput) {
  new Matches m;
  ret flexMatchIC(pat, tokInput, m) ? m : null;
}