The abstract definition of
EclipseLinkStateObjectVisitor, which implements all the
methods but does nothing. It can be subclassed so that only the required methods are overridden.
Provisional API: This interface is part of an interim API that is still under development and
expected to change significantly before reaching stability. It is available at this early stage
to solicit feedback from pioneering adopters on the understanding that any code that uses this
API will almost certainly be broken (repeatedly) as the API evolves.