pub unsafe extern "C" fn weld_conf_get(conf: weld_conf_t, key: *const c_char) -> *const c_char {
    let conf = conf as *mut weld::WeldConf;
    let conf = &*conf;
    match conf.get(key.to_str()) {
        Some(k) => k.as_ptr(),
        None => ptr::null_mut(),
    }
}
Get a value associated with a key for a configuration.

This function is a wrapper for `WeldConf::get`.
weld-capi/src/lib.rs