Swift Dictionary Encoder and Decoder, based off the JSONEncoder in Foundation.
Internally the JSONEncoder in the Swift Foundation creates a dictionary before encoding to JSON and the JSONDecoder works from a Dictionary parsed from JSON data. This encoding/decoding to and from a dictionary is hidden and not available to the user.
DictionaryEncoder is essentially the same as JSONEncoder but instead of returning JSON data, it returns the Dictionary<String, Any> the JSON data would have been generated from. Likewise DictionaryDecoder is essentially the same as JSONDecoder except it's input is a Dictionary<String, Any>.