sdlWcsstr function
extern DECLSPEC wchar_t *SDLCALL SDL_wcsstr(const wchar_t *haystack, const wchar_t *needle)
Implementation
Pointer<Int16> sdlWcsstr(Pointer<Int16> haystack, Pointer<Int16> needle) {
  final sdlWcsstrLookupFunction = libSdl2.lookupFunction<
      Pointer<Int16> Function(Pointer<Int16> haystack, Pointer<Int16> needle),
      Pointer<Int16> Function(
          Pointer<Int16> haystack, Pointer<Int16> needle)>('SDL_wcsstr');
  return sdlWcsstrLookupFunction(haystack, needle);
}