A default map allows for a generator producing values automatically if you want to add something to a map that does not have a value associated with a given key.
This does not implement the default map interface as return types (and some future methods may) change
A default map allows for a generator producing values automatically if you want to add something to a map that does not have a value associated with a given key. This does not implement the default map interface as return types (and some future methods may) change