(Optional) The basic or embeddable class that is the element type of the collection. This element is
optional only if the collection field or property is defined using Java generics, and must be specified
otherwise. It defaults to the paramterized type of the collection when defined using generics.
(Optional) Whether the collection should be lazily loaded or must be eagerly fetched. The EAGER
strategy is a requirement on the persistence provider runtime that the collection elements must be
eagerly fetched. The LAZY strategy is a hint to the persistence provider runtime.