late final _CFStringGetCStringPtr =
      _lookup<
        ffi.NativeFunction<
          Boolean Function(
            CFStringRef,
            ffi.Pointer<ffi.Char>,
            CFIndex,
            CFStringEncoding,
          )
        >
      >('CFStringGetCString');

  ConstStringPtr CFStringGetPascalStringPtr(
    CFStringRef theString,
    int encoding,
  ) {
    // The expression does not evaluate to a function.
    return _CFStringGetPascalStringPtr(theString, encoding);
  }