Function nova_rt_str_to_lower 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn nova_rt_str_to_lower(
    s: *const NovaStr,
) -> *mut NovaStr

Lowercase s with full Unicode case mapping. Whole-string for the same reason as nova_rt_str_to_upper.

Safety

s must point to a valid NovaStr.