if ( session == null ) {
throw new TransientObjectException(
"Proxy is detached (i.e, session is null). The read-only/modifiable setting is only accessible when the proxy is associated with an open session." );
}
if ( session.isClosed() ) {
throw new SessionException(
"Session is closed. The read-only/modifiable setting is only accessible when the proxy is associated with an open session." );
}
}