Will fetch the represented value from persistant storage.
Will fetch the represented value from persistant storage.
Returns the represented value if it was already fetched into memory, error otherwise.
Returns the represented value if it was already fetched into memory, error otherwise.
Will return the represented value from memory or fetch it otherwise.
Will return the represented value from memory or fetch it otherwise.
Decribes whether or not the represented value was already fetched into memory.
Decribes whether or not the represented value was already fetched into memory.
The ID of the owner entity.
The ID of the owner entity.
Represents a unfetched value of a 'to many' relationship for a specific owner instance.