private void EnsureDictSplatSite() {
if (_dictSite == null) {
Interlocked.CompareExchange(
ref _dictSite,
CallSite<Func<CallSite, CodeContext, object, object[], IDictionary<object, object>, object>>.Create(
Binders.InvokeKeywords(_context.LanguageContext)
),
null
);
}
}