Recovers a given entity in the database.
Optionaloptions: SaveOptionsReloads entity data from the database.
Removes current entity from the database.
Optionaloptions: RemoveOptionsSaves current entity in the database. If entity does not exist in the database then inserts, otherwise updates.
Optionaloptions: SaveOptionsRecords the delete date of current entity.
Optionaloptions: SaveOptions
Checks if entity has an id. If entity composite compose ids, it will check them all.