pub unsafe extern "C" fn duk_opt_boolean(
ctx: *mut duk_context,
idx: duk_idx_t,
def_value: duk_bool_t,
) -> duk_bool_tpub unsafe extern "C" fn duk_opt_boolean(
ctx: *mut duk_context,
idx: duk_idx_t,
def_value: duk_bool_t,
) -> duk_bool_t