pub unsafe extern "C" fn duk_opt_number(
ctx: *mut duk_context,
idx: duk_idx_t,
def_value: duk_double_t,
) -> duk_double_tpub unsafe extern "C" fn duk_opt_number(
ctx: *mut duk_context,
idx: duk_idx_t,
def_value: duk_double_t,
) -> duk_double_t