public static void FLMutableDict_SetData(FLMutableDict x, string key, byte[] slice)
 {
     using (var key_ = new C4String(key))
         fixed(byte *slice_ = slice)
         {
             NativeRaw.FLMutableDict_SetData(x, (FLSlice)key_.AsFLSlice(), new FLSlice(slice_, (ulong)slice.Length));
         }
 }