public static Task <IList <IExpression> > DeserializeExpressionsAsync(this IExpressionSerializer serializer, Stream jsonStream)
 {
     return(serializer.DeserializeAsync <IList <IExpression> >(jsonStream));
 }
 public static T Deserialize <T>(this IExpressionSerializer serializer, Stream jsonStream)
 {
     return(serializer.DeserializeAsync <T>(jsonStream).GetAwaiter().GetResult());
 }