sbool boolOptParam(ThreadLocal<Bool> tl) {
  ret isTrue(optPar(tl));
}

// defaults to false
sbool boolOptParam(O[] _, S name) {
  ret isTrue(optParam(_, name));
}

sbool mapMethodLike boolOptParam(S name, O[] _) {
  ret boolOptParam(_, name);
}

sbool mapMethodLike boolOptParam(S name, Map _) {
  ret isTrue(optPar(name, _));
}