An abstract base class for mementos that encapsulate the state of a
MementoOriginator . Basically, a token storing the state of another
object.
Mementos are expected to be managed by caretakers (clients) without
the clents being aware of their internal structure. Only the originator is aware of
the internal structure of a concrete Memento implementation.
Mementos are expected to be managed by caretakers (clients) without the clents being aware of their internal structure. Only the originator is aware of the internal structure of a concrete Memento implementation.