/// <summary>Create a new key by appending a value to the current subspace</summary>
 /// <param name="item">Value that will be appended at the end of the key</param>
 /// <returns>Key the correspond to the concatenation of the current subspace's prefix and <paramref name="item"/></returns>
 /// <example>tuple.PackBoxed(x) is the non-generic equivalent of tuple.Pack&lt;object&gt;(tuple)</example>
 public static Slice PackBoxed(this IFdbSubspace subspace, object item)
 {
     return(FdbTuple.PackBoxedWithPrefix(subspace.ToFoundationDbKey(), item));
 }