public Enumerator(InlineDictionary <TKey, TValue> parent)
 {
     _arr   = null;
     _first = default;
     _index = -1;
     _inner = default;
     if (parent._data is Dictionary <TKey, TValue> inner)
     {
         _inner = inner.GetEnumerator();
         _type  = Type.Dictionary;
     }
     else if (parent._data is KeyValuePair <TKey?, TValue?>[] arr)
     {
         _type = Type.Array;
         _arr  = arr;
     }
     else if (parent._data != null)
     {
         _type  = Type.Single;
         _first = new((TKey)parent._data !, parent._value !);
     }
     else
     {
         _type = Type.Empty;
     }
 }
 private void SerializeInlineDictionary(List<string> output, InlineDictionary dictionary)
 {
     output.Add("{");
     for (int i = 0; i < dictionary.Keys.Length; ++i)
     {
         if (i > 0) output.Add(", ");
         SerializeExpression(output, dictionary.Keys[i]);
         output.Add(": ");
         SerializeExpression(output, dictionary.Values[i]);
     }
     output.Add("}");
 }